a fruit seller sells mangoes at the rate of rs . 16 per kg and thereby loses 12 % . at what price per kg , he should have sold them to make a profit of 20 % ?
"solution 88 : 16 = 120 : x x = ( 16 ã — 120 / 88 ) = rs . 21.81 hence , s . p per kg = rs . 21.81 answer a"
divide(multiply(16, add(const_100, 20)), subtract(const_100, 12))