Question

on increasing the salary of a man by 25% ,it becomes rs 20000.what was his original salary?

Answer 1

let his original salary b x on increasing to 25% it becomes 20000 so x+x*25%=20000
x+x/4=20000
5x/4=20000
x=20000*4/5
x=80000/5
x=rs16000

Answer 2

x+ x × $\frac{25}{100}$ = 20000
$\frac{100 x}{100}$ + $\frac{25x}{100}$ = 20000
125x = 2000000
x = $\frac{2000000}{125}$
x = 16000