John saved $840 and spent the rest of his money. If he decreased his savings by 25%, his spending would increase by 21%. How much money did John have?
| |
Spent (%) |
Saved (u) |
| Before |
100%
$840 |
100u |
| Change |
- 25% |
+ 21u |
| After |
75% |
121u |
Increase in savings = Decrease in spending
25% savings =
21u spending 100% savings = 840
1% savings = 840 ÷ 100 = 8.4
25% savings = 25 x 8.4 = 210
21u spending = 2101u spending = 210 ÷ 21 = 10100u spending = 100 x 10 = 1000 Amount that John had
= 840 + 1000
= $1840
Answer(s): $1840
