唔識做,請幫幫忙－kfsdgte的部落格

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唔識做,請幫幫忙

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NO.1 Mr.Cheng sold a van for $212 500 and made a loss of $37 500. Find the percentage loss.No.2 Kenneth buys a dozen of pencils for $36 and sells them at a profit of 40%. What is the selling price of each pencil?No.3 The cost of 10 dozens of eggs is $60. If half of the eggs are sold at a profit of 50%, and... 顯示更多 NO.1 Mr.Cheng sold a van for $212 500 and made a loss of $37 500. Find the percentage loss. No.2 Kenneth buys a dozen of pencils for $36 and sells them at a profit of 40%. What is the selling price of each pencil? No.3 The cost of 10 dozens of eggs is $60. If half of the eggs are sold at a profit of 50%, and the rest are sold at a profit of 30%, find the profit from selling all the eggs. No.4 A car is sold for $120 000 at a profit of 25%. Find the cost of the car. No.5 A model ship is sold for $225 at a loss 25%. How much does it cost? 唔識做,請幫幫忙,要有列式,plz~~~

最佳解答:

NO.1 Mr.Cheng sold a van for $212 500 and made a loss of $37 500. Find the percentage loss.37500/(37 500+212500)X100% =-15%so, percentage loss=15% No.2 Kenneth buys a dozen of pencils for $36 and sells them at a profit of 40%. What is the selling price of each pencil?each pencil 36X(1+40%)/12 =$4.2 No.3 The cost of 10 dozens of eggs is $60. If half of the eggs are sold at a profit of 50%, and the rest are sold at a profit of 30%, find the profit from selling all the eggs.profit 30X(1+50%)+30X(1+30%)-60 =$24percentage profit [30X(1+50%)+30X(1+30%)-60]/60X100% =(45+39-60)/60X100% =40% No.4 A car is sold for $120 000 at a profit of 25%. Find the cost of the car.cost 120000X(1+25%) =$150000 No.5 A model ship is sold for $225 at a loss 25%. How much does it cost?cost 225X(1-25%) =$168.75

其他解答:

1. 37500 / (212500 + 37500) x 100% = 37500 / 250000 x 100% = 15% 2. 36 x (1+40%) / 12 = 50.4 / 12 = 4.2 3. 60/10 x 5 x (1+50%) + 60/10 x 5 x (1+30%) - 60 = 45 + 39 - 60 = 24 4. 120000 / (1+25%) = 96000 5. 225 / (1-25%) = 300