Correct Answer - Option 4 : 25%
Given:
With discount offered equal to 20% on marked price, the selling price becomes equal to cost price.
Concepts used:
M.P. = S.P. + Discount
Discount % = Discount/M.P. × 100
Calculation:
Let M.P. be Rs. x.
Discount % = 20
⇒ (x – S.P.)/x × 100 = 20
⇒ x = 5S.P./4
⇒ S.P. = 4x/5
As S.P. = C.P.,
⇒ C.P. = 4x/5
⇒ Marked up percentage = (M.P. – C.P.)/C.P. × 100 = [{x – (4x/5)}/(4x/5)] × 100 = 25%
∴ M.P. is more than C.P. by 25%.