Jack saves 30% of his income. When his income was increased by 40%, his savings rose proportionately to $210. What was his original income?
|
Savings |
Spending |
Total |
Before |
30% |
70% |
100% |
Change |
+ 12% |
+ 28% |
+ 40% |
After |
42% |
98% |
140% |
New income after it was increased by 40%
= 100% + 40%
= 140%
Increase in savings
= 40% x 30%
=
40100 x 30%
= 12%
New savings in percentage
= 30% + 12%
= 42%
42% of the original income = 210
1% of the original income = 210 ÷ 42 = 5
100% of the original income = 100 x 5 = 500
Jack's original income = $500
Answer(s): $500