a number exceeds 20 % of itself by 40 . the number is
"explanation : let the answer be ' a ' then a − 20 / 100 a = 40 ⇒ 5 a − a = 200 ⇒ a = 50 ⇒ a = 50 correct option : a"
divide(40, subtract(const_1, divide(20, const_100)))