Correct Answer - Option 4 : 20%
Given
A shopkeeper fixes the marked price of a pair of shoes 45% above its cost price
Formula used
MP(1 - D/100) = SP
SP = Selling price
MP = Marked price
D = Discount
SP = CP + Profit%
Calculation
Let Cost pice be 100
⇒ MP = 145
⇒ Profit = 16
⇒ SP = 116
⇒ Discount = 145 - 116 = 29
⇒ Discount% = (29/145)× 100
⇒ 20%
∴ Discount is 20%