uncle bruce is baking chocolate chip cookies . he has 36 ounces of dough ( with no chocolate ) and 13 ounces of chocolate . how many ounces of chocolate are left over if he uses all the dough but only wants the cookies to consist of 20 % chocolate ?
answer is a . x / x + 36 = 1 / 5 x = 9 13 - 9 = 4
multiply(divide(20, const_100), 20)