paul ' s salary was decreased by 50 % and subsequently increased by 50 % . how much percent does he lose ?
let the original salary = $ 100 new final salary = 150 % of ( 50 % of rs . 100 ) = $ ( ( 150 / 100 ) * ( 50 / 100 ) * 100 ) = $ 75 . decrease = 25 % answer option b ) 25 .
subtract(const_100, add(50, divide(multiply(50, 50), const_100)))