a trader bought a car at 20 % discount on its original price . he sold it at a 45 % 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 * ( 145 / 100 ) = 116 100 - 116 = 16 % c )"
multiply(subtract(divide(divide(multiply(subtract(const_100, 20), add(const_100, 45)), const_100), const_100), const_1), const_100)