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 ?
"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"
divide(multiply(subtract(multiply(540, divide(add(const_100, 15), const_100)), 462), const_100), multiply(540, divide(add(const_100, 15), const_100)))