Question

A retailer marks his goods at 30% above the cost price and then allows a discount of 30%. What is his gain or loss percent?​

Answer 1

Answer:

↑%=30%

MP= CP+30% of MP

Mp= (100CP+30MP)/100

100MP-30MP=100CP

70MP=100CP

MP= 100Cp/70

MP= 10Cp/7

then,

SP= MP- D% of MP

SP= MP- 30% of MP

SP = (100Mp-30MP)/100

100SP = 70MP

MP= 100SP/70

MP= 10SP/7

10CP/7 = 10Sp/7

70Cp= 70SP

CP= 70SP/70

Cp= Sp

therefore there is neither loss nor profit :D