Question

vegetable seller bought 20 kg of potatoes at the rate of Rs 5 per kg out of which 5 kg were rotten he sold the remaining potatoes at the rate Rs 8 per kg find his profit or loss percent

Answer 1

bought = 20 kg
rate = 5rs / kg
total cost = 20*5 = 100

sell = 15 kg
rate = 8rs / kg
selling amount =15*8 = 120

profit = 120-100 = 20