Justin saves 20% of his income. When his income was increased by 50%, his savings rose proportionately to $210. What was his original income?
|
Savings |
Spending |
Total |
Before |
20% |
80% |
100% |
Change |
+ 10% |
+ 40% |
+ 50% |
After |
30% |
120% |
150% |
New income after it was increased by 50%
= 100% + 50%
= 150%
Increase in savings
= 50% x 20%
=
50100 x 20%
= 10%
New savings in percentage
= 20% + 10%
= 30%
30% of the original income = 210
1% of the original income = 210 ÷ 30 = 7
100% of the original income = 100 x 7 = 700
Justin's original income = $700
Answer(s): $700