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 choice from the following answers:
A) 22	B) 88	C) 20	D) 88	E) 62
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?