the cost price of an article is 64 % of the marked price . calculate the gain percent after allowing a discount of 18 % ?
"explanation : let marked price = rs . 100 . then , c . p . = rs . 64 , s . p . = rs . 82 gain % = 18 / 64 * 100 = 28.125 % . answer : option d"
multiply(subtract(divide(subtract(const_100, 18), 64), const_1), const_100)