Selling an kite for Rs. 30, a shop keeper gains 25%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is? Pick one:
A) 8%
B) 10%
C) 11%
D) 12.5%
E) 20%
Explanation:   Marked price = Rs. 30   C.P. = 100/125 * 30 = Rs. 24   Sale price = 90% of Rs. 30 = Rs. 27   Required gain % = 3/24 * 100= 
<gadget id="calculator">3/24 * 100</gadget>
<output>25/2 = around 12.5</output>
12.5%.   Answer: 12.5%
<result>D</result>
Selling an kite for Rs. 30, a shop keeper gains 25%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?