David spent $510 and saved the rest of his money. If he decreased his spending by 40%, his savings would increase by 25%. How much money did David have?
| |
Spent (%) |
Saved (u) |
| Before |
100%
$510 |
100u |
| Change |
- 40% |
+ 25u |
| After |
60% |
125u |
Increase in spending = Decrease in savings
40% spending =
25u savings 100% spending = 510
1% spending = 510 ÷ 100 = 5.1
40% spending = 40 x 5.1 = 204
25u savings = 2041u savings = 204 ÷ 25 = 8.16100u savings = 100 x 8.16 = 816 Amount that David had
= 510 + 816
= $1326
Answer(s): $1326
