an uneducated retailer marks all his goods at 40 % above the cost price and thinking that he will still make 25 % profit , offers a discount of 25 % on the marked price . what is his actual profit on the sales ?
sol . let c . p . = rs . 100 . then , marked price = rs . 140 . s . p . = 75 % of rs . 140 = rs . 105 . ∴ gain % = 5 % . answer c
multiply(subtract(subtract(add(const_1, divide(40, const_100)), multiply(add(const_1, divide(40, const_100)), divide(25, const_100))), const_1), const_100)