A dishonest shopkeeper professes to sell grains at the cost price, but he uses a weight of 920 gm for 1 kg weight. Find his gain percentage (round up to two decimal places).
Answer
The correct answer is D: 8.70%. Gain% = (Error/(True value − Error))×100 = (80/920)×100 = 8.695% ≈ 8.70%.