Carl spent $640 and saved the rest of his money. If he decreased his spending by 10%, his savings would increase by 40%. How much money did Carl have?
| |
Spent (%) |
Saved (u) |
| Before |
100%
$640 |
100u |
| Change |
- 10% |
+ 40u |
| After |
90% |
140u |
Increase in spending = Decrease in savings
10% spending =
40u savings 100% spending = 640
1% spending = 640 ÷ 100 = 6.4
10% spending = 10 x 6.4 = 64
40u savings = 641u savings = 64 ÷ 40 = 1.6100u savings = 100 x 1.6 = 160 Amount that Carl had
= 640 + 160
= $800
Answer(s): $800
