1.運動用品店以$300出售網球拍,虧蝕百分率是25%;又以$780出售運動套裝,盈利百分率是20%.
出售2塊網球拍和1套運動套裝的總盈百分率/虧蝕百分率.
2.商店擬定收音機的標價時,期望獲得盈利百分率50%
收音機的標是$240,商店以九折賣出收音機,求收音機的總盈利百分率.
數學問題~~~~百分數
2008-02-12 2:31 am
回答 (2)
2008-02-12 4:45 am
✔ 最佳答案
1. 300x2+780-[300x(1+25%)]x2-780x(1-20%)___________________________________ x100%
300x2+780
1380-375x2-624
= ______________ x100%
1380
1380-750-624
= _____________ x100%
1380
6
=_____ x100%
1380
10
= __
23
2. 240x(1+50%)-[240x(1+50%)x90%]
=240x150%-(240x150%x90%)
=-360-324
=36
2008-02-12 4:48 am
1)
網球拍原價 = 300/(1-25%) = $400
運動套裝原價 = 780/(1+20%) = $650
2塊網球拍和1套運動套裝原價 = 400 + 650 = $1050
2塊網球拍和1套運動套裝售價 = 300 + 780 = $1080
總盈百分率/虧蝕百分率 = [(1080 - 1050)/1050] x 100% = +2.86%
2)
收音機的原價 = 240/(1+50%) = $160
收音機的最後售價 = 240x(1-10%) = $216
總盈百分率/虧蝕百分率 = [(216 - 160)/160] x 100% = +35%
網球拍原價 = 300/(1-25%) = $400
運動套裝原價 = 780/(1+20%) = $650
2塊網球拍和1套運動套裝原價 = 400 + 650 = $1050
2塊網球拍和1套運動套裝售價 = 300 + 780 = $1080
總盈百分率/虧蝕百分率 = [(1080 - 1050)/1050] x 100% = +2.86%
2)
收音機的原價 = 240/(1+50%) = $160
收音機的最後售價 = 240x(1-10%) = $216
總盈百分率/虧蝕百分率 = [(216 - 160)/160] x 100% = +35%
收錄日期: 2021-04-13 15:07:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080211000051KK03124