Irene's salary is 30% more than Kylie's salary. When their salaries are increased by 50%, their combined salaries will be $12420. How much was Irene's salary before the increase?
| |
Irene |
Kylie |
Total |
| Before |
13 u |
10 u |
23 u |
| Change |
+ ? |
+ ? |
+ 11.5 u |
| After |
? |
? |
34.5 u
$12420 |
100% + 30% = 130%
IreneKylie =
130100 =
1310 Combined salaries at first
= 13 u + 10 u
= 23 u
Increase in the combined salaries
= 50% x 23 u
=
50100 x 23 u
= 11.5 u
Combined salaries in the end
= 23 u + 11.5 u
= 34.5 u
34.5 u = 12420
1 u = 12420 ÷ 34.5 = 360
Irene's salary before the increase
= 13 u
= 13 x 360
= $4680
Answer: $4680
