更新1:
Answer is 260% First one is correct but 我要用個個方法系Second one
快快快!!!中一數學~ Percentages
2011-11-18 4:03 am
1. A few years ago, Mr Chan bought 10 kg Tea A for $130 per kg and 2 kg Tea B for $600 per kg. Now he just sells all of the two types of tea for $400 and $2500 per kg respecyively. On the whole, What is the profit per cent?
回答 (3)
2011-11-18 7:57 pm
✔ 最佳答案
cost :tea A 130 x 10 = 1300
tea B 600 x 2 = 1200
sold :
tea A 400 x 10 = 4000
tea B 2500 x 2 = 5000
profit :
tea A 4000 - 1300 = 2700
tea B 5000 - 1200 = 3800
profit percentage :
(2700 + 3800) / (1300 + 1200) x 100%
= 6500/2500 x 100%
= 260%
2011-11-18 4:34 am
Let Me try:
Mr Chan Profit on Tea A:
(400-130)*10
=$2700
Mr Chan Profit on Tea B:
(2500-600)*2
=$3800
Profit Percentage:
(2700+3800)-(1300+1200) *100%
1300+1200
=160%
Mr Chan Profit on Tea A:
(400-130)*10
=$2700
Mr Chan Profit on Tea B:
(2500-600)*2
=$3800
Profit Percentage:
(2700+3800)-(1300+1200) *100%
1300+1200
=160%
2011-11-18 4:28 am
{{[400(10) + 2500(2)] - [130(10) + 600(2)]}/[130(10) + 600(2)]}100%
={[(4000 + 5000) - (1300 + 1200)]/(1300 + 1200)}100%
=[(9000 - 2500)/2500]100%
=(6500/2500)100%
=(65/25)100%
=260%
={[(4000 + 5000) - (1300 + 1200)]/(1300 + 1200)}100%
=[(9000 - 2500)/2500]100%
=(6500/2500)100%
=(65/25)100%
=260%
收錄日期: 2021-04-20 11:50:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111117000051KK00767