a merchant sells an item at a 20 % discount , but still makes a gross profit of 20 percent of the cost . what percent of the cost would the gross profit on the item have been if it had been sold without the discount ?
"soln : - original sp = x cost = c current selling price = . 8 x ( 20 % discount ) . 8 x = 1.2 c ( 20 % profit ) x = 1.2 / . 8 * c x = 3 / 2 c original selling price is 1.5 c which is 50 % profit answer : c"
subtract(const_100, subtract(subtract(const_100, 20), 20))