mahesh marks an article 15 % above the cost price of rs . 540 . what must be his discount percentage if he sells it at rs . 456 ?
"cp = rs . 540 , mp = 540 + 15 % of 540 = rs . 621 sp = rs . 456 , discount = 621 - 456 = 165 discount % = 165 / 621 * 100 = 26.57 % answer : b"
divide(multiply(subtract(multiply(540, divide(add(const_100, 15), const_100)), 456), const_100), multiply(540, divide(add(const_100, 15), const_100)))