1) Eric earns $ 16 000 per month. He spends 35% of his salary on rent, 45% on other expenses, and saves the rest.
a. How much does he save each month?
b. If his salary and rent remains unchanges, and he wants to spend $ 800 more on other expense, find th percentage decrease in his savings.
F.1 數學題....唔明....... 10點10點,,,,急需急需
2006-12-03 1:11 am
回答 (2)
2006-12-03 1:31 am
✔ 最佳答案
其實這條數唔難,可能睇唔明吧先看翻譯版,再看答案
Eric 每月薪金有 $ 16 000 . 35%薪金 用來 交租, 45%薪金用在其他支出, 其餘的則存起來.
1a.問他每月儲蓄多少
1b.他的薪金和租金不變,他想用多$800在其他支出,找出儲蓄部分下降了多少百分比
1a
He saves:
$16000x(1-35%-45%)
=$16000x20%
=$3200
1b
New amount of his savings
$3200-$800
=$2400
Precentage change of his savings
[($2400-$3200)/$3200}x100%
= -$800/$3200 x100%
=-25%
therefore, his savings decrease in 25%
或者
1b
Precentage change of his savings
$800/$3200 x100%
=25%
therefore, his savings decrease in 25%
參考: work of a F3 student!
2006-12-03 1:15 am
He save each month:
16000 X (100-35-45%)
=16000 x 20%
=3200
2006-12-02 17:21:18 補充：
b. the percentage decrease in his savings is: 800 / 16000 X 100% = 5%
16000 X (100-35-45%)
=16000 x 20%
=3200
2006-12-02 17:21:18 補充：
b. the percentage decrease in his savings is: 800 / 16000 X 100% = 5%
收錄日期: 2021-04-12 20:11:01
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