the cost price of an article is 36 % of the marked price . calculate the gain percent after allowing a discount of 20 % .
"sol . let marked price = rs . 100 . then , c . p . = rs . 36 . s . p = rs . 80 . â ˆ ´ gain % = [ 44 / 36 * 100 ] % = 122.2 % . answer d"
multiply(subtract(divide(subtract(const_100, 20), 36), const_1), const_100)