by selling 22 pencils for a rupee a man loses 40 % . how many for a rupee should he sell in order to gain 40 % ?
"60 % - - - 22 140 % - - - ? 60 / 140 * 22 = 9.43 answer : c"
multiply(divide(const_1, multiply(add(const_100, 40), divide(const_1, subtract(const_100, 40)))), 22)