a trader bought a car at 20 % discount on its original price . he sold it at a 55 % increase on the price he bought it . what percent of profit did he make on the original price ?
"original price = 100 cp = 80 s = 80 * ( 155 / 100 ) = 124 100 - 124 = 24 % answer : b"
multiply(subtract(divide(divide(multiply(subtract(const_100, 20), add(const_100, 55)), const_100), const_100), const_1), const_100)