summer holiday assignment幾題幫解釋

[匿名]

2012-08-31 11:38 pm

The price of a package of stationery dropped from $15to12$.By what percentage did the price drop?
There is1.25L of orange juice in Edward's bottle.After refilling,there is2.25Lof orange juice in his bottle.What percentage does the amount of orange juice in Edward's bottle increase?
The volume of tanks A,B,C are 5m3, 3m3 and 8m3 respecticvely. What percentage of the total volume of tanks AandB is the volume of tankC?
There are 20 apples and 30 pears.5apples and 5 pears are rotten.What percentage of the number of fruits not rotten is the number of rotten fruits?
唔該QQ

更新1:

最好教埋點做

回答 (1)

Curry123888

2012-09-01 12:37 am

✔ 最佳答案

1. [(15-12)/15]x100%
=20%
2. [(2.25-1.25)/1.25]x100%
=80%
3. [(5+3)/8]x100%
=100%
4. [(20-5+30-5)/10]x100%
=400%

👍 0 👎 0