Ian saves 40% of his allowance. When his allowance was decreased by 25%, his savings decreased proportionately to $90. What was his original allowance?
| |
Savings |
Spending |
Total |
| Before |
40% |
60% |
100% |
| Change |
- 10% |
- 15% |
- 25% |
| After |
30% |
45% |
75% |
New allowance after it was decreased by 25%
= 100% - 25%
= 75%
Decrease in savings
= 25% x 40%
=
25100 x 40%
= 10%
New savings in percentage
= 40% - 10%
= 30%
30% of the original allowance = 90
1% of the original allowance = 90 ÷ 30 = 3
100% of the original allowance = 10 x 3 = 300
Ian's original allowance = $300
Answer(s): $300
