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Question 66

A number is increased by 10% and then reduced by 10%. After this operation, the number

Solution

Let number be 100

When it is increased by 10%, => new number = 110

When it is decreased by 10%, => new number = $$\frac{90}{100}\times110=99$$

Thus, original number decrease by 1%.

[Method 2]

% Change = $$10+(-10)+\frac{10\times(-10)}{100}$$

= $$-1\%$$

=> Ans - (B)

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