Pierre saved $280 and spent the rest of his money. If he decreased his savings by 30%, his spending would increase by 21%. How much money did Pierre have?
| |
Spent (%) |
Saved (u) |
| Before |
100%
$280 |
100u |
| Change |
- 30% |
+ 21u |
| After |
70% |
121u |
Increase in savings = Decrease in spending
30% savings =
21u spending 100% savings = 280
1% savings = 280 ÷ 100 = 2.8
30% savings = 30 x 2.8 = 84
21u spending = 841u spending = 84 ÷ 21 = 4100u spending = 100 x 4 = 400 Amount that Pierre had
= 280 + 400
= $680
Answer(s): $680
