Billy spent $150 and saved the rest of his money. If he decreased his spending by 30%, his savings would increase by 15%. How much money did Billy have?
| |
Spent (%) |
Saved (u) |
| Before |
100%
$150 |
100u |
| Change |
- 30% |
+ 15u |
| After |
70% |
115u |
Increase in spending = Decrease in savings
30% spending =
15u savings 100% spending = 150
1% spending = 150 ÷ 100 = 1.5
30% spending = 30 x 1.5 = 45
15u savings = 451u savings = 45 ÷ 15 = 3100u savings = 100 x 3 = 300 Amount that Billy had
= 150 + 300
= $450
Answer(s): $450
