if x is less than y by 25 % then y exceed x by :
"using formula ( x / ( 100 - x ) * 100 ) where x is percentage decrease ( here it is 25 % ) = > 25 ( 100 - 25 ) * 100 = 33.33 % answer : a"
multiply(subtract(divide(const_100, subtract(const_100, 25)), const_1), const_100)