if 40 % of a number exceeds 25 % of it by 18 , then find the number ?
"use the elimination method to find the correct option . of all the options only 120 fits 40 % of 120 = 48 25 % of 120 = 30 48 - 30 = 18 required number is 180 . answer : a"
add(divide(18, divide(subtract(40, 25), const_100)), 25)