if 15 % of 40 is greater than 25 % of a number by 2 , then the number is ?
"let the number be x 50 % of 40 - 25 % of x = 2 25 / 100 x = ( 15 / 100 * 40 ) - 2 x / 4 = 4 x = 16 answer is e"
divide(subtract(multiply(divide(15, const_100), 40), 2), divide(25, const_100))