Mahesh marks an article 15% above the cost price of Rs. 540. What must be his discount percentage if he sells it at Rs. 496.80? Choose the correct answer
A) 22
B) 27
C) 20
D) 21
E) 12
CP = Rs. 540, MP = 540 + 15% of 540 = Rs. 621   SP = Rs. 496.80, Discount = 621 - 496.80= 
<gadget id="calculator">621 - 496.80</gadget>
<output>124.2</output>
124.20   Discount %= 124.2/621 * 100= 
<gadget id="calculator">124.2/621 * 100</gadget>
<output>20</output>
20%.Answer: 20
<result>C</result>
Mahesh marks an article 15% above the cost price of Rs. 540. What must be his discount percentage if he sells it at Rs. 496.80?