a man two flats for $ 512456 each . on one he gains 20 % while on the other he loses 20 % . how much does he gain or lose in the whole transaction ?
in such a case there is always a loss loss % = ( 20 / 10 ) ^ 2 = 4 % answer is e
multiply(divide(subtract(add(multiply(divide(const_100, add(const_100, 20)), 512456), multiply(divide(const_100, subtract(const_100, 20)), 512456)), add(512456, 512456)), add(multiply(divide(const_100, add(const_100, 20)), 512456), multiply(divide(const_100, subtract(const_100, 20)), 512456))), const_100)