the salary of a person was reduced by 28 % . by what percent should his reduced salary be raised so as to bring it at par with his original salary ?
"let the original salary be $ 100 new salary = $ 72 increase on 72 = 28 increase on 100 = [ ( 28 / 72 ) 100 ] % = 38.9 % answer is e"
multiply(divide(multiply(const_100, divide(28, const_100)), subtract(const_100, multiply(const_100, divide(28, const_100)))), const_100)