Adam spends $200 of his income and saves the rest.
When he increases his spending by 15%, his savings decreases by 5%
- How much is Adam's savings at first?
- How much is Adam's savings in the end?
- How much is Adam's income?
|
Spending |
Savings |
Before |
100% |
100 u |
Change |
+ 15% |
- 5 u |
After |
115% |
95 u |
(a)
15% of Adam's spending = 5% of Adam's savings
100% of Adam's spending = $200
1% of Adam's spending = 200 ÷ 100 = $2
15% of Adam's spending = 15 x 2 = $30
5 u of Adam's savings = $30
1 u of Adam's savings = 30 ÷ 5 = $6
100 u of Adam's savings = 100 x 6 = $600
Amount of Adam's savings at first
= 100 u
= $600
(b)
Amount of savings in the end
= 95 u
= 95 x 6
= $570
(c)
Adam's income
= 100% + 100 u
= 200 + 600
= $800
Answer(s): (a) $600; (b) $570; (c) $800