Maths F.1－fksnlix的部落格

標題:

Maths F.1

發問:

the marded price of a game machine is $500.If a shopkeeper raises the marked price by 20%,and sells it to a customer at a 20% discount. C.Find the overall percentage discount. 更新: 要式Thank~

最佳解答:

您好，我是 lop，高興能解答您的問題。 (C) The new marked price : 500 × ( 1 + 20% ) = 500 × 120/100 = $600 The new selling price : 600 × ( 1 - 20% ) = 600 × 80/100 = $480 The overall percentage discount : ( 500 - 480 ) ÷ 500 × 100% = (20/5)(%) = 4% Answer : The overall percentage discount is 4% .

其他解答:

The final price is 500 * (1 + 20%) * (1 - 20%) = 480the overall percentage discount= (480 - 500)/500= -4%|||||[(500*1.2*0.8)/500]*100% =(600*0.8/500)*100% =(480/500)*100% =0.96*100% =96%