a dishonest dealer professes to sell goods at the cost price but uses a weight of 500 grams per kg , what is his percent ?
"500 - - - 500 100 - - - ? = > 100 % answer : e"
subtract(multiply(divide(const_100, 500), multiply(const_100, multiply(add(const_3, const_2), const_2))), const_100)