A shopkeeper marks his goods 25% above the cost price and gives 20% discount to customers. At the time of selling the goods, he uses 800 gm weight instead of 1 kg, and at the time of buying the goods, he uses 1200 gm instead of 1 kg. Find his profit?

50%

Profit → \(\frac{1}{2}\) × 100% = 50%

Say, CP of 1000 gm goods = ₨. 100

The original CP of1200 gm = ₨. 100,

Marked price = ₨. 125

Discount = 20%

SP = 125 x \(\frac{6}{5}\) = 150

SP of 800 gm = ₨. 150

To make quantities equal,

Actual CP = ₨. 100 x 8 = ₨. 800

Actual SP = ₨. 150 x 12 = ₨. 1800

Profit = 1800 - 800 = 1000

Profit% = \(\frac{1000}{800}\) x 100 = 125%