if a ' s salary is 20 % less than b ' s salary , by how much percent is b ' s salary more than a ' s ?
solution required percentage ‹ = › [ 20 / ( 100 - 20 ) x 100 ] % ‹ = › 25 % answer d
divide(subtract(const_100, subtract(const_100, 20)), divide(subtract(const_100, 20), const_100))