Fiona's salary is 70% more than Mary's salary. When their salaries are increased by 10%, their combined salaries will be $10989. How much was Fiona's salary before the increase?
| |
Fiona |
Mary |
Total |
| Before |
17 u |
10 u |
27 u |
| Change |
+ ? |
+ ? |
+ 2.7 u |
| After |
? |
? |
29.7 u
$10989 |
100% + 70% = 170%
FionaMary =
170100 =
1710 Combined salaries at first
= 17 u + 10 u
= 27 u
Increase in the combined salaries
= 10% x 27 u
=
10100 x 27 u
= 2.7 u
Combined salaries in the end
= 27 u + 2.7 u
= 29.7 u
29.7 u = 10989
1 u = 10989 ÷ 29.7 = 370
Fiona's salary before the increase
= 17 u
= 17 x 370
= $6290
Answer: $6290
