the cost price of an article is 56 % of the marked price . calculate the gain percent after allowing a discount of 13 % .
"sol . let marked price = rs . 100 . then , c . p . = rs . 56 . s . p = rs . 87 . â ˆ ´ gain % = [ 31 / 56 * 100 ] % = 55.3 % . answer c"
multiply(subtract(divide(subtract(const_100, 13), 56), const_1), const_100)