幫下手諗下.....咩方法都得...
Jack and Jane share a sum of $6000.Then Jack gives some of his money to Jane. If Jane's share is increased by 15% and becomes $1380, find the percentage decrease in Jack's share.
Thanks!
F.1數學
2007-12-15 5:10 am
回答 (2)
2007-12-16 6:45 am
✔ 最佳答案
jane originally has : 1380/ (1+0.15)=1200, therefore, jack has 6000-1200=4800after jack gives jane money, he has 6000-1380=4630
so percentage decrease=(4630-4800) / 4800= 3.54%
ops. 6000-1380=4620*
ANS:3.75%
參考: ME
2007-12-15 5:17 am
original jane's share : 1380 / (1+15%) = 1200
original jack's share : 6000-1200 = 4800
new jane's share : 1380
new jacks's share : 6000-1380 = 4620
percentage decrease : (4800 - 4620) / 4800 * 100% = 3.75%
original jack's share : 6000-1200 = 4800
new jane's share : 1380
new jacks's share : 6000-1380 = 4620
percentage decrease : (4800 - 4620) / 4800 * 100% = 3.75%
參考: ME
收錄日期: 2021-04-25 20:18:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071214000051KK03344