A number is first reduced by 10% and then it is again increased by 10%

1.	A number is first reduced by 10% and then it is again increased by 10%. Then the number is changed by (A) 20% increase (B) 10% decrease (C) 10% increase (D) 1% decrease
Answer» (D) 1% decrease (x - 10% of x) + 10% of (x - 10% of x) = 99x / 100 %change \(\cfrac{x-\frac{99x}{100}}{x}\) x 100 = 1% ∴ 1% decrease

A number is first reduced by 10% and then it is again increased by 10%. Then the number is changed by (A) 20% increase (B) 10% decrease (C) 10% increase (D) 1% decrease

Answer»

(D) 1% decrease

(x - 10% of x) + 10% of (x - 10% of x) = 99x / 100

%change \(\cfrac{x-\frac{99x}{100}}{x}\) x 100 = 1%

∴ 1% decrease

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A number is first reduced by 10% and then it is again increased by 10%. Then the number is changed by (A) 20% increase (B) 10% decrease (C) 10% increase (D) 1% decrease

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