a trader bought a car at 30 % discount on its original price . he sold it at a 70 % increase on the price he bought it . what percent of profit did he make on the original price ?
"original price = 100 cp = 70 s = 70 * ( 170 / 100 ) = 119 100 - 119 = 19 % answer : e"
multiply(subtract(divide(divide(multiply(subtract(const_100, 30), add(const_100, 70)), const_100), const_100), const_1), const_100)