Fanny's salary is 10% less than Kimberly's salary. When their salaries are decreased by 40%, their combined salaries will be $3420. How much was Kimberly's salary before the decrease?
| |
Fanny |
Kimberly |
Total |
| Before |
9 u |
10 u |
19 u |
| Change |
- ? |
- ? |
- 7.6 u |
| After |
? |
? |
11.4 u
$3420 |
100% - 10% = 90%
FannyKimberly =
90100 =
910 Combined salaries at first
= 9 u + 10 u
= 19 u
Decrease in the combined salaries
= 40% x 19 u
=
40100 x 19 u
= 7.6 u
Combined salaries in the end
= 19 u + 7.6 u
= 11.4 u
11.4 u = 3420
1 u = 3420 ÷ 11.4 = 300
Kimberly's salary before the decrease
= 10 u
= 10 x 300
= $3000
Answer: $3000
