數學問題-----------_0－貨運百科

標題:

數學問題???????????

發問:

數學問題: 1. If apair of shoes is sold at $148.5,there is a loss of 10%. What is the selling price if the shop keeper wants to make a profit of 20%? 2. An item was sold at a price of $46 and a profitof 15% was made. If it was sold at $33.6 instead, what would be the loss per cent?

最佳解答:

1. If a pair of shoes is sold at $148.5,there is a loss of 10%. What is the selling price if the shop keeper wants to make a profit of 20%? The cost = 148.5 ÷ ( 1 - 10% ) = 148.5 ÷ 90% = $165 If the shop keeper wants to make a profit of 20%, 165 x ( 1 + 20% ) = 165 x 120% = 198 // 2. An item was sold at a price of $46 and a profitof 15% was made. If it was sold at $33.6 instead, what would be the loss per cent? The cost = 46 ÷ ( 1 + 15% ) = 46 ÷ 115% = 40 [(40 - 33.6) / 40 ] x 100% = (6.4 / 40 ) x 100% = 640 /40 % = 16% //

其他解答:

1.148.5/(1-10%)x(1+20%)=$198 2.(46/(1+15%)-33.6)/(46/(1+15%))x100%=6.4/40x100%=16%