the cost price of an article is 55 % of the marked price . calculate the gain percent after allowing a discount of 15 % .
sol . let marked price = rs . 100 . then , c . p . = rs . 55 . s . p = rs . 85 . â ˆ ´ gain % = [ 30 / 55 * 100 ] % = 54.5 % . answer c
multiply(subtract(divide(subtract(const_100, 15), 55), const_1), const_100)