Question

by selling an article of 240 to a gain of 20% for how much he purchase it?

Answer 1

Sp = 240
P%= 20%

To find
CP = ?

SP = CP + profit .....in case of profit

SP= CP + p% * CP
240 = CP + CP * 20/100
120/100 CP = 240
CP = 200 rupees

Answer 2

let the cp be x
x+ 20%ofx=240
x+x/5=240
6x/5=240
x=200answer