Question

Find value when 400 is decreased by 25 percent.

Answer 1

Hint – In order to solve this problem we need to know that if a is decreased by b percent then the value will be $a - \dfrac{{ba}}{{100}}$. Using this, your problem will be solved and you will get the right answer.

Complete step-by-step answer:
We have to decrease 400 by 25 percent.
We know that a is decreased by b percent then the value will be $a - \dfrac{{ba}}{{100}}$.
So we do $400 - \dfrac{{25(400)}}{{100}} = 400 - 4(25) = 400 - 100 = 300$.
Hence, the answer to this question is 300.

Note – In this question we have to decrease 400 by 25 percent so we have calculated 25 percent of 400 and then subtracted it from 400 to get the value when it is decreased by 25 percent. Proceeding like this will give you the right answer.