if a man lost 1 % by selling oranges at the rate of 16 a rupee at how many a rupee must he sell them to gain 44 % ?
"99 % - - - - 16 144 % - - - - ? 99 / 144 * 16 = 11 answer : d"
divide(multiply(subtract(const_100, 1), 16), add(const_100, 44))