Question

A no. when $35$ is subtracted from it, reduces to its $80\%$. what is the four fifth of that no?

Answer 1

Let the number be x.

so, According to given question.

$x-35=x\times 80\%$

$x-35=x\times \frac{80}{100}$

$x-35=x\times \frac{8}{10}$

$x-35=x\times \frac{4}{5}$

$5x-175=4x$

$5x-4x=175$

$x=175$

What is the four fifth =

$\frac{4}{5}x=\frac{4}{5}\times 175$

$=4\times 35$

$=140$

Hence, this is the answer