Olivia's salary is 70% more than Anna's salary. When their salaries are increased by 30%, their combined salaries will be $13689. How much was Olivia's salary before the increase?
| |
Olivia |
Anna |
Total |
| Before |
17 u |
10 u |
27 u |
| Change |
+ ? |
+ ? |
+ 8.1 u |
| After |
? |
? |
35.1 u
$13689 |
100% + 70% = 170%
OliviaAnna =
170100 =
1710 Combined salaries at first
= 17 u + 10 u
= 27 u
Increase in the combined salaries
= 30% x 27 u
=
30100 x 27 u
= 8.1 u
Combined salaries in the end
= 27 u + 8.1 u
= 35.1 u
35.1 u = 13689
1 u = 13689 ÷ 35.1 = 390
Olivia's salary before the increase
= 17 u
= 17 x 390
= $6630
Answer: $6630
