Jade's salary is 70% more than Zoe's salary. When their salaries are decreased by 20%, their combined salaries will be $9720. How much was Jade's salary before the decrease?
| |
Jade |
Zoe |
Total |
| Before |
17 u |
10 u |
27 u |
| Change |
- ? |
- ? |
- 5.4 u |
| After |
? |
? |
21.6 u
$9720 |
100% + 70% = 170%
JadeZoe =
170100 =
1710 Combined salaries at first
= 17 u + 10 u
= 27 u
Decrease in the combined salaries
= 20% x 27 u
=
20100 x 27 u
= 5.4 u
Combined salaries in the end
= 27 u + 5.4 u
= 21.6 u
21.6 u = 9720
1 u = 9720 ÷ 21.6 = 450
Jade's salary before the decrease
= 17 u
= 17 x 450
= $7650
Answer: $7650
