Question

A number was increased by $20\%$. By what percent this again is to be decreased to obtain the original number?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

Let the original number be 100x
When increased by $20\%$, it becomes = 120x
Now to get the original numbers,
120x is to be decreased by 20x
1 is to be decreased by $\frac{20x}{120x}$
100 is to be decreased by $\frac{20x}{120x}.100=\frac{50}{3}$
$16\frac{2}{3}\%$ is to be decreased.