a number x is 5 times another number y . the percentage that y is less than x is
"say y = 1 and x = 5 . then y = 1 is less than x = 5 by ( 5 - 1 ) / 5 * 100 = 4 / 5 * 100 = 80 % . answer : c ."
multiply(divide(subtract(5, const_1), 5), const_100)