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Given,

$(\Rightarrow \FRAC{{\sqrt {7744}\times 66}}{{203 + 149}} = ?)$

⇒? = (88 × 66)/352

⇒? = (11 × 66)/44(DIVIDING numerator and denominator by 8)

⇒? = 66/4 = 16.5

Follow BODMAS rule to solve this question, as per the order given below,

Step - 1 - Parts of an EQUATION enclosed in the ‘BRACKETS’ must be solved first

Step - 2 - Any mathematical ‘OF’ or ‘EXPONENTS’ must be solved next

Step - 3 - Next the part of the equation that contains ‘DIVISION; and ‘MULTIPLICATION’ are calculated

Step - 4 - Last but not least, the parts of the equation that contains ‘ADDITION’ and ‘SUBTRACTION’ should be calculated

Now, the given expression:

⇒ 410 × ? × 26 = 67250 + 50010

⇒ 10660 × ? = 117260

⇒ $(?\; = \;\frac{{117260}}{{10660}}\; = \;11)$

FOLLOW BODMAS RULE to solve this question, as per the order given below,

Step - 1 - Parts of an equation enclosed in 'Brackets' must be solved first,

Step - 2 - Any mathematical 'Of' or 'Exponent' must be solved next,

Step - 3 - Next, the parts of the equation that CONTAIN 'Division' and 'Multiplication' are calculated,

Step - 4 - Last but not LEAST, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Now, the given expression,

⇒ 9 – {7 – 24 ÷ (8 + 6 × 2 - 16)} = 9 – {7 – 24 ÷ (8 + 12 - 16)}

⇒ 9 – {7 – 24 ÷ (20 - 16)} = 9 – {7 – 24 ÷ 4} = 9 – {7 – 6}

⇒ 9 – 1 = 8

We have the expression

$(\begin{array}{l} 3\frac{6}{7} - 6\frac{1}{4} + 5\frac{1}{3} = ?\\ \Rightarrow \frac{{21\; + \;6}}{7} - \frac{{24\; + \;1}}{4} + \frac{{15\; + \;1}}{3} = ?\\ \Rightarrow \frac{{27}}{7} - \frac{{25}}{4} + \frac{{16}}{3} = ? \end{array})$

LCM of 7, 4 and 3 is 84

$(\begin{array}{l} \Rightarrow \frac{{27\; \times 12}}{{84}} - \frac{{25\; \times 21}}{{84}} + \frac{{16\; \times 28}}{{84}} = ?\\ \Rightarrow \frac{{324 - 525 + 448}}{{84}} = ? \end{array})$

⇒ ? = 247/84

⇒ 348 ÷ 29 × 16 + 144 = (?)³ + 211

⇒ 12 × 16 + 144 = (?)³ + 211

⇒ (?)³ = 192 + 144 - 211

⇒ (?)³ = 125

⇒ ? = 5

Given expression:

76% of 1285 = 35% of 1256 +?

$(\Rightarrow \FRAC{{76}}{{100}} \TIMES 1285 = \frac{{35}}{{100}} \times 1256 + ?)$

⇒ ? = 976.6 - 439.6 = 537

Follow BODMAS rule to SOLVE this question, as per the order given below,

Step-1: Parts of an equation enclosed in 'Brackets' must be SOLVED first, and in the BRACKET,

Step-2: Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3: Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4: Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given EXPRESSION is,

⇒ {(81 + 17 × 2) ÷ 5} + 2 = (?)²

⇒ (?)² = {(81 + 34) ÷ 5} + 2

⇒ (?)² = (115 ÷ 5) + 2

⇒ (?)² = 23 + 2

⇒ (?)² = 25

⇒ (?)² = 5²

⇒ ? = 5

Follow BODMAS rule to SOLVE this question, as per the order given below,

Step - 1 - Parts of an equation enclosed in 'Brackets' must be solved first,

Step - 2 - Any mathematical 'Of' or 'Exponent' must be solved next,

Step - 3 - Next, the parts of the equation that CONTAIN 'Division' and 'Multiplication' are calculated,

Step - 4 - LAST but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated

5 × 2 – [3 – {5 – (7 + 2 of 4 - 19)}] = 5 × 2 – [3 – {5 – (7 + 8 - 19)}] = 5 × 2 – [3 – {5 – (15 - 19)}]

⇒ ? = (3 × 5) % of 20 - 18 ÷ 2 + 1

⇒ ? = 15% of 20 - 18 ÷ 2 + 1

⇒ ? = 15/100 × 20 - 18 ÷ 2 + 1

⇒ ? = 3 - 9 + 1

⇒ ? = 4 - 9 = -5

∴ ? = -5

Follow BODMAS rule to solve this QUESTION, as per the order given below,

Step 1: Parts of an equation enclosed in 'Brackets' must be solved first, and in the bracket,

Step 2: Any mathematical 'Of' or 'Exponent' must be solved NEXT,

Step 3: Next, the parts of the equation that CONTAIN 'Division' and 'Multiplication' are calculated,

Step 4: Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

⇒ {(7999 + 2001) ÷ 4} × 0.05 = (5)^?

⇒ (10000 ÷ 4) × 0.05 = (5)^?

⇒ (2500 × 0.05) = (5)^?

⇒ 125 = (5)^?

⇒ 5³ = 5^?

⇒ ? = 3

Follow BODMAS rule to solve this question, as per the order given below,

Step-1 - PARTS of an equation ENCLOSED in 'Brackets' must be SOLVED first, and in the bracket,

Step-2 - Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3 - Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4 - Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

√1224 × 12.06 + √4897 - (18.98)² = ?

Taking Approximate values as,

 √1224 ≈ √1225, 12.06 ≈ 12, √4897 ≈ √4900, (18.98)² ≈ (19)²

⇒ √1225 × 12 + √4900 - (19)² = ?

⇒ 35 × 12 + 70 - 361 = ?

Given expression is

$(\begin{array}{l} \RIGHTARROW \frac{{37 \times 7 - 29 \times 5}}{{{7^2} + \sqrt {169} + {{\LEFT( 9 \right)}^2}}} = ?\\ \Rightarrow \frac{{259 - 145}}{{49 + 13 + 81}} = ? \end{array})$

99.8/9.98 = 499/?

⇒ 10 = 499/?

⇒ ? = 499/10 = 49.9

According to the BODMAS rule, the PRIORITY in which the operations should be done is:

⇒ 902.91 ÷ (13.98 ÷ 2.05) × 35.02 = (?) - 399.85

Approximating the values to the nearest integer:

⇒ 400 + 903 ÷ (14 ÷ 2) × 35 = (?)

(?) = 400 + 903 ÷ (7) × 35 

(?) = 400 + 903 × 1/7 × 35 

(?) = 400 + 903 × 5 

(?) = 400 + 4515 

(?) = 4915

GIVEN expression,

16865 + 22473 + 31045 – 70102 = ?

⇒ ? = 70383 – 70102

14.8957 × 6.1231 - 7.8888 × 11.111 + 1.0039 = ?

TAKING their approx. values

[15 × 6 - 8 × 11 + 1] = ?

⇒ ? = 90 - 88 + 1

⇒ ? = 91 - 88

Follow BODMAS rule to solve this question, as per the order given below,

Step-1- Parts of an equation ENCLOSED in 'Brackets' must be solved first, and in the bracket, the BODMAS rule must be followed,

Step-2- Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3-Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4-Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given EXPRESSION is,

⇒ 38 + (32 - 50) ÷ 9 × 7 of 3 - {78 ÷ (9+ 4)} =?

⇒ 38 + (-18) ÷ 9 × 7 of 3 - {78 ÷ 13} =?

⇒ 38 + (-18) ÷ 9 × 7 of 3 - 6 =?

⇒ 38 + (-18) ÷ 9 × 21 – 6 =?

⇒ 38 + (-2) × 21 – 6 =?

⇒ 38 - 42 – 6 =?

⇒ -10

Hence, the required answer is -10

In this type of question, we are expected to calculate Approximate value (not exact value), so we can replace the given numbers by their nearest perfect places which makes the calculation easy.

We can write the given values as:

89898 ≈ 9 × 10000

2.486 ≈ 2.5

Now the given EXPRESSION will be transformed as:

$(\begin{array}{l} \SQRT {89898} \times 2.486 = ?\\ \RIGHTARROW ? \approx \sqrt {9 \times 10000} \times 2.486 \end{array})$

⇒ ? ≈ 3 × 100 × 2.5

TOTAL AMOUNT of calorie intake =CALORIES from PIE A + Calories from Pie B + Calories from Pie C

⇒ Total amount of calorie = (20.5)(0.25 × 3) + (30.5)(0.1) + (10)(0.25)

⇒ Total amount of calorie = (20.5)(0.75) + (30.5)(0.1) + (10)(0.25)

⇒ Total amount of calorie = 15.375 + 3.05 + 2.5 = 20.925

The GIVEN expression:

38952 – 15631 + 10890

⇒ 23321 + 10890 = 34211

GIVEN expression:

⇒ 88% of 650 + ? = 600

$(\Rightarrow \frac{{88}}{{100}}\; \TIMES \;650\; + \;?\; = \;600)$

⇒ 572 + ? = 600

⇒ ? = 600 – 572

Follow BODMAS rule to solve this QUESTION, as per the order given below,

Step-1 - Parts of an equation enclosed in 'Brackets' must be solved FIRST, and in the bracket,

Step-2 - Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3 - Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4 - Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

√1850 × √1160 ÷ √290 = ? × 7 - 12

Taking Approximate values,

√1850 ≈ √1849, √1160 ≈ √1156, √290 ≈ √289

⇒ 43 × 34 ÷ 17 = ? × 7 - 12

⇒ 7 × ? = 86 + 12 = 98

7 + 36 = 39 + 100 - ?

? = 96

$(\begin{array}{L} 3 - \left( {\frac{1}{5} + 1 \DIV \frac{1}{2}} \right) - \left[ {\left\{ {\frac{4}{2} - \frac{3}{2}} \right\} + 1} \right] \TIMES \frac{7}{8}\\ = 3 - \left( {\frac{1}{5} + 1 \div \frac{1}{2}} \right) - \left[ {\frac{1}{2} + 1} \right] \times \frac{7}{8}\\ = 3 - \left( {\frac{1}{5} + 2} \right) - \frac{3}{2} \times \frac{7}{8}\\ = 3 - \frac{{10 + 1}}{5} - \frac{{21}}{{16}}\\ = \frac{{3 \times 80 - 11 \times 16 - 21 \times 5}}{{80}}\\ = \frac{{240 - 176 - 105}}{{80}} \end{array})$

= -41/80

⇒ (5.01)³ × (48.98)² ÷ (35.01)⁴ = x²

⇒ x² = 5³ × 49² ÷ 35⁴

⇒ x² = 5³ × (7²)² ÷ (7 × 5)⁴

⇒ x² = 1/5

81/90 × 10/3 × 9/18 × 2/5

= $(\frac{{81{\RM{\;}} \TIMES {\rm{\;}}10{\rm{\;}} \times {\rm{\;}}9{\rm{\;}} \times {\rm{\;}}2}}{{90{\rm{\;}} \times {\rm{\;}}3{\rm{\;}} \times {\rm{\;}}18{\rm{\;}} \times {\rm{\;}}5}})$

= $(\frac{{81{\rm{\;}} \times {\rm{\;}}9{\rm{\;}} \times {\rm{\;}}2}}{{9{\rm{\;}} \times {\rm{\;}}3{\rm{\;}} \times {\rm{\;}}18{\rm{\;}} \times {\rm{\;}}5}})$

= $(\frac{{27{\rm{\;}} \times {\rm{\;}}2}}{{18{\rm{\;}} \times {\rm{\;}}5}})$

= $(\frac{{3\; \times \;2}}{{2\; \times \;5}})$

= 6/10 = 3/5

Follow BODMAS rule to solve this question, as PER the order given below,

Step-1- Parts of an equation enclosed in 'Brackets' MUST be solved first, and in the bracket, the BODMAS rule must be followed,

Step-2- Any MATHEMATICAL 'Of' or 'Exponent' must be solved next,

Step-3-Next, the parts of the equation that contain 'Division' and 'Multiplication' are CALCULATED,

Step-4-Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

(21)² – 3717 ÷ 59 = ? × 12

⇒ 441 – 3717 ÷ 59 = ? × 12

⇒ 441 – 63 = ? × 12

⇒ 378 = ? × 12

Follow BODMAS rule to solve this question, as per the order given below,

Step - 1 - PARTS of an equation ENCLOSED in the ‘BRACKETS’ MUST be solved first

Step - 2 - Any mathematical ‘OF’ or ‘EXPONENTS’ must be solved NEXT

Step - 3 - Next the part of the equation that contains ‘DIVISION; and ‘MULTIPLICATION’ are calculated

Step - 4 - LAST but not least, the parts of the equation that contains ‘ADDITION’ and ‘SUBTRACTION’ should be calculated

Now, the given expression:

⇒ 207 ÷ 3 × 2.25 + 43.5 – 9 = ?

⇒ 69 × 2.25 + 43.5 – 9 = ?

⇒ 155.25 + 43.5 – 9 = ?

⇒ 198.75 – 9 = ?

⇒ 189.75 = ?

Solve the given QUESTION, using following laws of indices,

Laws of Indices,

1-: a^m × aⁿ = a^{{m + n}}

2-: a^m ÷ aⁿ = a^{{m - n}}

3-: [(a^m)ⁿ] = a^mn

4-: (a)^1/m = $(\sqrt[m]{a})$

5-: (a)^-m = 1/a^m

6-: (a)^(m/n) = $(\sqrt[n]{{{a^m}}})$

7-: a⁰ = 1

$(\begin{array}{L} \Rightarrow \frac{{{3^{a + 1}}\;{9^{a + 2}}\;{{27}^a}}}{{{3^{a - 1}}\;{9^a}\;{{27}^{a + 1}}}} = {\rm{\;}}?\\ \Rightarrow ? = \frac{{{3^{a + 1}}\;{3^{2\left( {a + 2} \right)}}\;{3^{3a}}}}{{{3^{a - 1}}\;{3^{2a}}\;{3^{3\left( {a + 1} \right)}}}}\\ \Rightarrow ? = \frac{{\;{3^{6a + 5}}}}{{{3^{6a + 2}}}} \end{array})$

⇒ ? = 3³

Follow BODMAS rule to solve this question, as per the order given below,

Step-1: Parts of an equation enclosed in the ‘BRACKETS’ MUST be solved first

Step-2: Any mathematical ‘OF’ or ‘EXPONEMTS’ must be solved next

Step-3: Next the part of the equation that CONTAINS ‘DIVISION; and ‘MULTIPLICATION’ are calculated

Step-4: LAST but not LEAST, the parts of the equation that contains ‘ADDITION’ and ‘SUBTRACTION’ should be calculated

Now, the given expression:

⇒ 937 + (9)³ ÷ 27 × (3)⁴ = ?

$(\Rightarrow 937\; + \;\frac{{{{\left( 9 \right)}^3}}}{{27}}\; \times \;{3^{4\;}}\; = \;?)$

⇒ 937 + (9)³ × 3 = ?

⇒ 937 + 729 × 3 = ?

⇒ 937 + 2187 = ?

(8.758 × 56) ÷ 16 - 1230 ÷ 240 = ? × 5.78

⇒ 490.448 ÷ 16 - 1230 ÷ 240 = ? × 5.78

⇒ 30.653 - 5.125 = ? × 5.78

⇒ 25.528 ÷ 5.78 = ?

GIVEN expression is,

$(\RIGHTARROW 13\frac{1}{3}\div 6\frac{2}{3} + 5\frac{5}{6} \TIMES \frac{3}{7} - 37.5\% \;of\;\frac{8}{3} = \;?)$

$(\Rightarrow \frac{{40}}{3} \times \frac{3}{{20}} + \frac{{35}}{6} \times \frac{3}{7} - \frac{3}{8}\; \times \frac{8}{3} = \;?)$

⇒ 2 + 2.5 – 1 = ?

∴ ? = 3.5

Follow BODMAS rule to solve this question, as per the order given below,

Step - 1 - PARTS of an equation enclosed in 'Brackets' must be solved first, and in the BRACKET, the BODMAS rule must be followed,

Step - 2 - Any mathematical 'Of' or 'Exponent' must be solved next,

Step - 3 - Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step - 4 - Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

4497 × 1204 ÷ 1795 – 2337 = ?

USING approximation,

⇒ 4500 × (1200 ÷ 1800) – 2340 = ?

⇒ 4500 × (2/3) – 2340 = ?

⇒ 3000 – 2340 = ?

⇒ 660 = ?

Follow BODMAS rule to SOLVE this question, as per the order given below,

Step-1- Parts of an equation enclosed in 'Brackets' must be solved first, and in the bracket,

Step-2- Any mathematical 'Of' or 'Exponent' must be solved NEXT,

Step-3- Next, the parts of the equation that contain 'Division' and 'Multiplication' are CALCULATED,

Step-4- Last but not LEAST, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

(3584 ÷ 32) – 11 = √?

⇒ 112 – 11 = √?

⇒ 101 = √?

⇒ ? = 101 × 101

GIVEN expression:

41.25 + 11.085 × 2.75 =?

⇒ ? = 41.25 + 30.48

⇒ ? = 71.73

⇒ ? ≈ 72

Follow BODMAS rule to solve this question, as per the order given below,

Step-1- PARTS of an equation enclosed in 'Brackets' must be solved first, and in the bracket,

Step-2- Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3- Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4- LAST but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

⇒ (181 × 5 + 277) ÷ 6 + 43 = 11 × ? - 46

⇒ (905 + 277) ÷ 6 + 43 = 11 × ? - 46

⇒ 1182 ÷ 6 + 43 = 11 × ? - 46

⇒ 197 + 43 = 11 × ? - 46

⇒ 240 = 11 × ? - 46

⇒ 240 + 46 = 11 × ?

⇒ 286 = 11 × ?

⇒ ? = 286 / 11

⇒ 6 + 4√2 = 2 + 4 + (2 × 2 × √ 2)

⇒ 6 + 4√2 = (2 + √2)²

1/17 × ?4913.28 + 25% of 401% of 300.008 + 1/13.0008 × ?2197.0008 = ?

It can be APPROXIMATED as

1/17 × ?4913 + 25% of 400% of 300 + 1/13 × ?2197 = ?

⇒ 1/17 × 17 + 1/4 × 4 × 300 + 1/13 × 13 = ?

⇒ 1 + 300 + 1 = ?

Follow BODMAS rule to solve this QUESTION, as PER the order given below,

Step 1: PARTS of an equation enclosed in 'Brackets' must be solved first, and in the bracket,

Step 2: Any mathematical 'Of' or 'Exponent' must be solved next,

Step 3: Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step 4: LAST but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

⇒ 11199 – 5666 + 999 = 8000 - ?

⇒ 12198 – 5666 = 8000 - ?

⇒ 6532 = 8000 - ?

⇒ ? = 1468

We are expected to calculate the approximate VALUE and not the EXACT value.

∴ the given numbers can be approximated as follows:

268.875 ≈ 270

8.835 ≈ 9

24.105 ≈ 24

∴ The given EXPRESSION becomes,

GIVEN EXPRESSION:

⇒ 65893 + 47630 =? + 74629

⇒ 65893 + 47630 – 74629 = ?

⇒ ? = 113523 – 74629 = 38894

Given EXPRESSION:

(9)^8.5 × (81)^7.5 ÷ (243)^-3 = 9^?

⇒ (3)¹⁷ × (3)³⁰ ÷ (3)^-15 = 9^?

⇒ (3)^{17 + 30} ÷ (3)^-15 = 9^?

⇒ (3)^{47 - (-15)} = 9^?

⇒ (3)⁶² = 9^?

⇒ (9)³¹ = 9^?

Follow BODMAS RULE to solve this question, as PER the order given below,

Step-1- PARTS of an equation enclosed in ‘Brackets’ must be solved first, and in the bracket,

Step-2- Any mathematical ‘Of’ or ‘EXPONENT’ must be solved next,

Step-3- Next, the parts of the equation that contain ‘Division’ and ‘MULTIPLICATION’ are calculated,

Step-4- Last but not least, the parts of the equation that contain ‘Addition’ and ‘Subtraction’ should be calculated.

Given expression is,

(51.01 ÷ 16.84) + 20.90 = 35.85 - ?

We can write the given values as:

51.01 ≈ 51 and 16.84 ≈ 17

20.90 ≈ 21 and 35.85 ≈ 36

Then,

⇒ (51 ÷ 17) + 21 = 36 - ?

⇒ 3 + 21 = 36 - ?

⇒ 24 = 36 - ?

⇒ ? = 36 - 24

45.98 + (4500 ÷ 122) − 8.75 × 12 + 36.101 × 1.499

Approximating values to the closest integers and solving

= 46 + 36.88 − 105 + 36 × 1.5

= 46 + 37 − 105 + 54

= 135 − 108

Follow BODMAS rule to solve this question, as per the order GIVEN below,

Step-1- Parts of an equation ENCLOSED in 'Brackets' MUST be solved first, and in the bracket,

Step-2- Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3- Next, the parts of the equation that CONTAIN 'Division' and 'Multiplication' are calculated,

Step-4- LAST but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

⇒ (28.20 × 7.91) ÷ (8.01% of 700) = 70.02 × 1.89 ÷ ?

We can write the given values as:

⇒ 28.20 ≈28 and 7.91 ≈ 8 and 8.01 ≈ 8

⇒ 70.02 ≈ 70 and 1.89 ≈ 9

Then,

⇒ (28 × 8) ÷ (8% of 700) = 70 × 2 ÷ ?

⇒ (224) ÷ [(8/100) × 700] = 70 × 2 ÷ ?

⇒ (224) ÷ (56) = 70 × 2 ÷ ?

⇒ 4 = 70 × 2 ÷ ?

⇒ 4/70 = 2/?

⇒ ? × 4 = 2 × 70

⇒ ? = 140/4

GIVEN EXPRESSION is,

35% of 250 + ? = 345

$(\FRAC{{35}}{{100}} \times 250 + \;? = 345)$

$(\Rightarrow \frac{{35}}{{100}} \times 250 + \;? = 345)$

⇒ 87.5 + ? = 345

Given expression is,

(91.87 + 118.10) ÷ 14.20 = 90.08 - 14.88 % of ?

We can write the given values as:

91.87 ≈ 92 and 118.10 ≈ 118

14.20 ≈ 14 and 90.08 ≈ 90 and 14.88 ≈ 15

Then,

⇒ (92 + 118) ÷ 14 = 90 - 15% of ?

⇒ (92 + 118) ÷ 14 = 90 - [(15/100) × ?]

⇒ 210 ÷ 14 = 90 - [15?/100]

⇒ 15 = 90 - (15?/100)

⇒ (15?/100) = 90 - 15

⇒ (15?/100) = 75

⇒ 15? = 75 × 100

⇒ ? = 7500/15

The given expression:

47% of 600 + ?% of 300 = 399

$(\Rightarrow \frac{{47}}{{100}} \times 600 + \frac{?}{{100}} \times 300 = 399)$

⇒ (47 × 6) + (? × 3) = 399

⇒ 282 + (? × 3) = 399

⇒ (? × 3) = 399 – 282

Follow BODMAS rule to solve this question, as per the order given below,

Step-1- PARTS of an equation enclosed in 'Brackets' must be solved first, and in the bracket,

Step-2- Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3- Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4- Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is,

$(45{\RM{\% \;of}}\SQRT {\LEFT( {255\; \div \;34\; \times \;146 - 6} \right)}+ \frac{7}{{12}}of\;{\left( {5.4} \right)^2}\; = \;?)$

Applying BODMAS Rule;

⇒ $(45{\rm{\% \;of}}\sqrt {\left( {7.5 \times 146 - 6\;} \right)}+ \frac{7}{{12}}of\;{\left( {5.4} \right)^2} = ?)$

⇒ $(45{\rm{\% \;of}}\sqrt {\left( {1089} \right)}+ \frac{7}{{12}}of\;29.16 = ?)$

⇒ 45% of 33 + 17.01 = ?

⇒ 14.85 + 17.01 = ?

$(294.01 \times \frac{X}{{7.01}} - 9.99\% \;of\;129.99\;x\; = \;231.99\; \div \;0.99)$

⇒ 294x/7 - 10% of 130x = 232 ÷ 1

⇒ 42x - 13X = 232

⇒ 29x = 232