a man cheats while buying as well as while selling . while buying he takes 10 % more than what he pays for and while selling he gives 20 % less than what he claims to . find the profit percent , if he sells at 9.09 % below the cost price of the claimed weight .
"( 1 + m 1 % ) ( 1 + m 2 % ) ( 1 - d % ) = ( 1 + p % ) 11 / 10 * 5 / 4 * 10 / 11 = ( 1 + p % ) profit % = 25 % answer : d"
multiply(subtract(add(const_100, 10), add(9.09, subtract(const_100, 20))), const_2)