一個書包的標價是$150,店主將標價提高15%後再以20%的折扣百分率出售~
求實際的折扣百分率~
請~列式~及~步驟~
Thx!~
一個書包的標價是$150,店主將標價提高15%後再 . . .
2007-04-12 6:50 am
回答 (6)
2007-04-12 6:57 am
✔ 最佳答案
提高15%後，價格為 $150 x (1+15%) = $172.5再以20%的折扣後，價格為 $172.5 x (1 - 20%) = $138
所以實際的折扣百分率 = (1 - 138/150) x 100% = 8%
參考: me
2007-04-12 7:01 am
首先搵佢提高左之後的價格:
150*115%
=172.5
折扣之後的價格:
172.5*(1-20%)
=138
實際折扣百分率:
138
── *100%
150
=92%
希望我冇計錯..
150*115%
=172.5
折扣之後的價格:
172.5*(1-20%)
=138
實際折扣百分率:
138
── *100%
150
=92%
希望我冇計錯..
參考: 自己
2007-04-12 7:00 am
150x(1+15%)x80%
=150x115%x80%
=150x115/100x80/100
=138
138/150x100%
=92%
所以實際的折扣百分率是92%
2007-04-11 23:02:11 補充：
sorry.打錯...150x(1+15%)x80%=150x115%x80%=150x115/100x80/100=1381-(138/150x100%)=8%所以實際的折扣百分率是8%
=150x115%x80%
=150x115/100x80/100
=138
138/150x100%
=92%
所以實際的折扣百分率是92%
2007-04-11 23:02:11 補充：
sorry.打錯...150x(1+15%)x80%=150x115%x80%=150x115/100x80/100=1381-(138/150x100%)=8%所以實際的折扣百分率是8%
參考: my sister
2007-04-12 6:59 am
100%-(100%+15%) x (100%-20%)
= 100%-115% x 80%
= 100%-92%
= 8%
= 100%-115% x 80%
= 100%-92%
= 8%
2007-04-12 6:57 am
150x(1+15%)x(1+20%)
=172.5x(1+20%)
=207
2007-04-11 22:59:16 補充：
我啊哥計的~他中三啦~
=172.5x(1+20%)
=207
2007-04-11 22:59:16 補充：
我啊哥計的~他中三啦~
收錄日期: 2021-04-13 00:22:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070411000051KK06442