黃先生的收入比李女士小15%. 但比陳女士多25%。而李女士的收入比陳小姐多$6400。
A: 黃先生收入是多小?`
B:李女士的收入比陳女士多百分之幾?`
THZ U `
-V- 又吾明`THZ` =3={ 中三}
2007-01-09 1:31 am
回答 (1)
2007-01-09 1:43 am
✔ 最佳答案
Let m be Mr. Wong's income, so m(1+15%) be Ms Lee's income, m(1-25%) be Ms Chan's incomeA:
m(1+15%) - m(1-25%) = 6400
1.15m-0.75m = 6400
0.4m = 6400
m = 16000
so Mr.Wong's income = 16,000 , Ms Lee's income = 18,400 , Ms Chan's income = 12,000
B:
(18400 - 12000) / 12000 X 100% = 53.33%
收錄日期: 2021-04-12 22:43:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070108000051KK02629