Mahesh marks an article 15% above the cost price of Rs. 540. What must be his discount percentage if he sells it at Rs. 462? Choose the correct choice from the following options:
A) 25.6 %	B) 21 %	C) 20 %	D) 19 %	E) none of these

Rationale: "cp = rs . 540 , mp = 540 + 15 % of 540 = rs . 621 sp = rs . 462 , discount = 621 - 462 = 159 discount % = 159 / 621 * 100 = 25.6 % answer : a"
Answer: A