By selling an umbrella for ₹ 30, a shopkeeper gains 20%. During a clearance sale, the shopkeeper allows a discount of 10% of the marked price. His gain percentage during the sale season is

Given, selling price of an umbrella = ₹ 30
Profit percentage = 20%
∴ Cost price of an umbrella = (30 x 100)/120 = ₹ 25
During the clearance sale, selling price of an umbrella = (30 x 90)/100 = ₹ 27
∴ Required profit percentage = [(27 - 25)/25] x 100% = 8%