one - third less than 20 % of 180 is equal to :
"lots of ways to tackle this . 20 % of 180 = 36 1 / 3 of 36 = 12 so , 1 / 3 , less than 36 is equal to 36 - 12 = 24 answer : a"
subtract(multiply(divide(20, const_100), 180), multiply(divide(const_1, const_3), multiply(divide(20, const_100), 180)))