1. Find the percentage increase in each of the following.
a An increase from 100 to 170. b An increase from 70 to 91.
c An increase of $12 from $24. d An increase of 15 kg from 75 kg.
2. Find the percentage decrease in each of the following.
a A decrease from 100 to 65. b A decrease from 70 to 35.
c A reduction of 35 kg from 140 kg. d A reduction of $2 500 from $12 500.
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2006-11-22 2:17 am
回答 (4)
2006-11-22 2:43 am
✔ 最佳答案
1) a) (170 - 100)/100 = 70%b) (91 - 70)/70 = 30%
c) 12/24 = 50%
d) 15/75 = 20%
2) a) (100 - 65)/100 = 35%
b) (70 - 35)/70 = 50%
c) 35/140 = 25%
d) 2500/12500 = 20%
Table (Orignal, New, % change):
a) 500, 600, +20% (given)
b) $2, $1.5, -25%
c) 88cm, 99cm, +12.5%
d) 285 C(度), 330.6 C(度), +16%
e) 60 kg, 56.4 kg, -6%
7) 7/56 = 12.5%
8) (1404 - 1300)/1300 = 8%
9) 8.7/580 = 1.5%
2006-11-21 18:44:41 補充：
9) 87/580 = 15%
2006-11-22 4:39 am
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2006-11-22 2:48 am
1a.%↑=(170-100)/100x100%=70%
b..%↑=(91-70)/70x100%=30%
c..%↑=(24-12)/12x100%=100%
d..%↑=(75-15)/15x100%=400%
2a.%↓=(100-65)/100x100%=35%
b..%↓=(70-35)/70x100%=50%
c..%↓=(140-35)/140x100%=75%
table:
b.%△=(1.5-2)/2x100%=-25%
c.%△=(99-88)/88x100%=25/4%
d.%△=(330.6-285)/285x100%=16%
e.%△=(56.4-60)/60x100%=-6%
7.%↑=(56+7-56)/56x100%=25/4%
8.%↑=(1404-1300)/1300x100%=8%
9.%↓=(580-(580-87))/580x100%=15%
b..%↑=(91-70)/70x100%=30%
c..%↑=(24-12)/12x100%=100%
d..%↑=(75-15)/15x100%=400%
2a.%↓=(100-65)/100x100%=35%
b..%↓=(70-35)/70x100%=50%
c..%↓=(140-35)/140x100%=75%
table:
b.%△=(1.5-2)/2x100%=-25%
c.%△=(99-88)/88x100%=25/4%
d.%△=(330.6-285)/285x100%=16%
e.%△=(56.4-60)/60x100%=-6%
7.%↑=(56+7-56)/56x100%=25/4%
8.%↑=(1404-1300)/1300x100%=8%
9.%↓=(580-(580-87))/580x100%=15%
參考: me
2006-11-22 2:38 am
1a.(170-100)除100乘100% = 70 %
1b.(91-70)除70乘100% = 30%
1c.12除24乘100% = 50%
1d 15除75乘100% = 20%
2a. (100-65)除100乘100% = 35%
2b. (70-35)除70乘100% = 50%
2c. 35除140乘100% =25%
2d. 2500除12500乘100% =20%
a. 500600 + 500600乘20% =600720
b.(2-1.5)除2乘100% = 25% decreased
c.(99-88)除88乘100% = 12.5% increased
d. (330.6 - 285)除285乘100% = 16% increased
e. (60-56.4)除60乘100% = 6% decreased
7. (63-56) 除56 乘100% = 12.5% increased
8. (1404-1300)除1300乘100% = 8% increased
9. 87除580乘100% = 15%decreased
1b.(91-70)除70乘100% = 30%
1c.12除24乘100% = 50%
1d 15除75乘100% = 20%
2a. (100-65)除100乘100% = 35%
2b. (70-35)除70乘100% = 50%
2c. 35除140乘100% =25%
2d. 2500除12500乘100% =20%
a. 500600 + 500600乘20% =600720
b.(2-1.5)除2乘100% = 25% decreased
c.(99-88)除88乘100% = 12.5% increased
d. (330.6 - 285)除285乘100% = 16% increased
e. (60-56.4)除60乘100% = 6% decreased
7. (63-56) 除56 乘100% = 12.5% increased
8. (1404-1300)除1300乘100% = 8% increased
9. 87除580乘100% = 15%decreased
收錄日期: 2021-04-13 14:41:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061121000051KK02693