How we get to know that where we have to cross multiple and where not (ques from subject maths)

How we get to know that where we have to cross multiple and where not

1.	How we get to know that where we have to cross multiple and where not (ques from subject maths)
Answer» -step explanation:Multiplying the top and bottom of a FRACTION by the same AMOUNT doesn't change its value.Step 1: Multiply the top and bottom of the first fraction by the bottom number of the second fraction.8 × 312 × 3 = 23Step 2: Multiply the top and bottom of the second fraction by the bottom number that the first fraction had.8 × 312 × 3 = 2 × 123 × 12And MAGIC! The bottom of both fractions is now 12 × 3Step 3: We can get RID of the 12 × 3 (as we are dividing both sides by the same amount) and the equation is still true:8 × 3 = 12 × 2