2.原值~新值~百分數增減~
**50~_______*******+8%
3.____~84~+20%
數學(百分數增減)
2007-01-16 3:06 am
回答 (2)
2007-01-16 3:12 am
✔ 最佳答案
2.)50*(1+8%) = 54
3.)
84/(1+20%) = 70
2007-01-16 4:51 am
x-50=4
x=54
新值為54
3.設原值為x
(84-x)/x *100=20
8400-100x=20x
120x=8400
x=70
原值為70
x=54
新值為54
3.設原值為x
(84-x)/x *100=20
8400-100x=20x
120x=8400
x=70
原值為70
收錄日期: 2021-04-12 23:18:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070115000051KK03614