Question

Find the cost price if the selling price is Rs.8 and the loss is 20per cent.

Answer 1

cost price= selling price + loss

let cost price is x

selling price is 8

loss percent is 20%* x = 0.2* x= 0.2x

x= 8+ 0.2x

x-0.2x = 8

0.8x = 8

x = 8/0.8

x = 10

so, the cost price is Rs. 10.

Answer 2

C.p = 100/100-L X S.p

C.p= 100/80 X 8

C.p= Rs.10