A dishonest dealer claims to sell goods at their Cost Price. He uses a weight of 900 gms in place of 1 kilogram. His real gain % is :
11.11%
Let the cost of 1 kg (i.e 1000 g) = ₹ 100.
Since, he uses a weight of 900 gms in place of 1 kilogram,
Cost Price = ₹ 90
Selling Price = ₹ 100
Gain%=GainCost Price
Gain%=₹ 10₹ 90×100=11.11%