Bobby saves 40% of his income. When his income was decreased by 15%, his savings decreased proportionately to $170. What was his original income?
| |
Savings |
Spending |
Total |
| Before |
40% |
60% |
100% |
| Change |
- 6% |
- 9% |
- 15% |
| After |
34% |
51% |
85% |
New income after it was decreased by 15%
= 100% - 15%
= 85%
Decrease in savings
= 15% x 40%
=
15100 x 40%
= 6%
New savings in percentage
= 40% - 6%
= 34%
34% of the original income = 170
1% of the original income = 170 ÷ 34 = 5
100% of the original income = 10 x 5 = 500
Bobby's original income = $500
Answer(s): $500
