Vanessa's salary is 40% less than Gillian's salary. When their salaries are decreased by 20%, their combined salaries will be $1664. How much was Gillian's salary before the decrease?
| |
Vanessa |
Gillian |
Total |
| Before |
3 u |
5 u |
8 u |
| Change |
- ? |
- ? |
- 1.6 u |
| After |
? |
? |
6.4 u
$1664 |
100% - 40% = 60%
VanessaGillian =
60100 =
35 Combined salaries at first
= 3 u + 5 u
= 8 u
Decrease in the combined salaries
= 20% x 8 u
=
20100 x 8 u
= 1.6 u
Combined salaries in the end
= 8 u + 1.6 u
= 6.4 u
6.4 u = 1664
1 u = 1664 ÷ 6.4 = 260
Gillian's salary before the decrease
= 5 u
= 5 x 260
= $1300
Answer: $1300
