Erika's salary is 70% less than Abi's salary. When their salaries are increased by 60%, their combined salaries will be $7904. How much was Abi's salary before the increase?
| |
Erika |
Abi |
Total |
| Before |
3 u |
10 u |
13 u |
| Change |
+ ? |
+ ? |
+ 7.8 u |
| After |
? |
? |
20.8 u
$$(n11040 |
100% - 70% = 30%
ErikaAbi =
30100 =
310 Combined salaries at first
= 3 u + 10 u
= 13 u
Increase in the combined salaries
= 60% x 13 u
=
60100 x 13 u
= 7.8 u
Combined salaries in the end
= 13 u + 7.8 u
= 20.8 u
20.8 u = 7904
1 u = 7904 ÷ 20.8 = 380
Abi's salary before the increase
= 10 u
= 10 x 380
= $3800
Answer: $3800
