Pierre spent $570 and saved the rest of his money. If he decreased his spending by 15%, his savings would increase by 30%. How much money did Pierre have?
| |
Spent (%) |
Saved (u) |
| Before |
100%
$570 |
100u |
| Change |
- 15% |
+ 30u |
| After |
85% |
130u |
Increase in spending = Decrease in savings
15% spending =
30u savings 100% spending = 570
1% spending = 570 ÷ 100 = 5.7
15% spending = 15 x 5.7 = 85.5
30u savings = 85.51u savings = 85.5 ÷ 30 = 2.85100u savings = 100 x 2.85 = 285 Amount that Pierre had
= 570 + 285
= $855
Answer(s): $855
