Answer :
regular price of a refrigerator = $ 600 20 percent off = 600 * 20/100 Discount = $ 120 the price is =600-120 = $480 ON SALE regular price of a refrigerator = $ 600 10 percent off = 600 * 10/100 Discount = $ 60 the price is =600-60 = $540 additional discount of 10 percent= $540 * 10/100 = $54 the price is = $540 - $54= $486 Therefore the regular discount is best to buy
it is 580 dollars because if you divide 600$ by 20 % you get 120 $ than you subtract 600 - 120 =580