Question

if a number is increased by 10% and then the number is decreased by 10%.what is the value of the number l​

Answer 1

Answer:

Hint-In this question we are given that a number is first increased by 10% and then reduced by 10%. For this, let the number at the start be 100 and apply the directions given in question to get the result. Hence the number is decreased by 1%. Therefore, the correct is B.

Answer 2

Solution :-

Let the number is increased by 10%

$x+\frac{10}{100}x=\frac{11x}{100}$

The number is decreased by 10%

$\frac{11x}{10}-\frac{10}{100}.\frac{11x}{10}=\frac{99x}{100}$

The final number is $\frac{99x}{100}$

If, decrease percentage is asked, then

Decrease % $=\frac{x-\frac{99x}{100}}{x}.100=\frac{\frac{x}{100}}{x}.100=1$

Remarks :-

Hope u liked my solution

Pls mark me as brainliest

Thanks.