Question

数学问题~

1、A photo frame is sold at profit of 30%.What is the cost price if the profit is $24?
2、Alan bought a computer game for $80 and then sold it to Barry for $52.Find Alan's loss per cent.
3、A laser printer is sold at a loss of 3% and the loss is $120.
(a)、Find the cost price of the laser printer.
(b)、If the laser printer is now sold at $3760,what is the loss per cent?
4、A shopowner bought 500 bottles of wine for$18000.He then sold them all at $50 each.
(a)、Find the total profit that he made.
(b)、Find the profit per cent,correct to the nearest integer.
5、Kitty bought a rabbit and a hamster for $220 and $35 respectively.
She sold the rabbit to David for $250 and sold the hamster to Dawn at a profit of 60%.Find the overall profit per cent that Kitty made on selling the two animals.
兔子：$220
仓鼠：$35
我不会做，麻烦各位帮忙想想，列式和答案就可以了~

Answer 1

1.$24/30%=$80
2.($80-$52)/$80=35%
3.(A)$120/3%=$4000
(B)($4000-$3760)/$4000=6%
4.(A)$50*500-$18000=$7000
(B)$7000/$18000=38.9%
5.(($250-$220)+$35*60%)/($220+$35)=20%

Answer 2

1。24/30%=30
2。(80-52)/80=35%
3。120/3%=4000 (4000-3760)/4000=6%
4。50x500-18000=7000 7000/18000=38.9%
5。250-220+35x60%=51

追问

5錯了，麻煩你，再試試好嗎？

Answer 3