a person buys an article at rs . 650 . at what price should he sell the article so as to make a profit of 10 % ?
"cost price = rs . 650 profit = 10 % of 650 = rs . 65 selling price = cost price + profit = 650 + 65 = rs . 715 answer : b"
add(650, multiply(650, divide(10, const_100)))