the positive numbers w , x , y , and z are such that x is 20 percent greater than y , y is 20 percent greater than z , and w is 20 percent less than x . what percent greater than z is w ?
y = 100 ( start with yy , it makes getting x easier ) . x = y * 1.2 = 120 z = y / 1.2 = 83.33 w = x * 0.8 = 96 then for the answer : ( w - z ) / z = ( 96 - 83.33 ) / 83.33 = 15.2 % answer : a
multiply(const_100, subtract(multiply(multiply(divide(add(20, const_100), const_100), divide(add(20, const_100), const_100)), divide(subtract(const_100, 20), const_100)), const_1))