Find the new value for each of the following.
a) 360 decreases by 25%, and then increases by 20%.
b) 52 increases by 4% , and then increases by 25%.
c) 100 increases by 10%, and then decreases by 12%.
d) 210 decreases by 14%, and then decreases by 50%.
Form Three Maths
2007-10-05 2:27 am
回答 (1)
2007-10-05 2:39 am
✔ 最佳答案
a)360x(1-25%)+[360x(1-25%)x20%]
=270+54
=327
b)
52x(1+4%)- [52x(1+4%)x25%]
=54.08-13.52
=40.56
c)
100x (1+10%) - [100x(1+10%)x12%]
=110-13.2
=96.8
d)
210x(1-14%)+[210x(1-14%)x50%]
=180.6-90.3
=45.15
2007-10-04 18:41:44 補充：
a)360x(1-25%) [360x(1-25%)x20%]=270 54=324sorry打錯, 324先岩
收錄日期: 2021-04-13 13:45:15
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071004000051KK02648