Barbara's salary is 40% more than Mary's salary. When their salaries are decreased by 30%, their combined salaries will be $2436. How much was Barbara's salary before the decrease?
| |
Barbara |
Mary |
Total |
| Before |
7 u |
5 u |
12 u |
| Change |
- ? |
- ? |
- 3.6 u |
| After |
? |
? |
8.4 u
$2436 |
100% + 40% = 140%
BarbaraMary =
140100 =
75 Combined salaries at first
= 7 u + 5 u
= 12 u
Decrease in the combined salaries
= 30% x 12 u
=
30100 x 12 u
= 3.6 u
Combined salaries in the end
= 12 u + 3.6 u
= 8.4 u
8.4 u = 2436
1 u = 2436 ÷ 8.4 = 290
Barbara's salary before the decrease
= 7 u
= 7 x 290
= $2030
Answer: $2030
