if x > 0 , x / 25 + x / 20 is what percent of x ?
"just plug and chug . since the question asks for percents , pick 100 . ( but any number will do . ) 100 / 25 + 100 / 20 = 4 + 5 = 9 9 is 9 % of 100 = a ."
multiply(add(divide(const_1, 25), divide(const_1, 20)), const_100)