Lucy's salary is 30% less than Ivory's salary. When their salaries are decreased by 40%, their combined salaries will be $2550. How much was Ivory's salary before the decrease?
| |
Lucy |
Ivory |
Total |
| Before |
7 u |
10 u |
17 u |
| Change |
- ? |
- ? |
- 6.8 u |
| After |
? |
? |
10.2 u
$2550 |
100% - 30% = 70%
LucyIvory =
70100 =
710 Combined salaries at first
= 7 u + 10 u
= 17 u
Decrease in the combined salaries
= 40% x 17 u
=
40100 x 17 u
= 6.8 u
Combined salaries in the end
= 17 u + 6.8 u
= 10.2 u
10.2 u = 2550
1 u = 2550 ÷ 10.2 = 250
Ivory's salary before the decrease
= 10 u
= 10 x 250
= $2500
Answer: $2500
