Gillian's salary to Shiyun's salary is 4 : 9. If Gillian spends
25 of her salary, she will have $2640 less than Shiyun. How much salary does Shiyun have?
| |
Gillian |
Shiyun |
Comparing Gillian
and Shiyun at first |
4x5 =
20 u |
9x5 =
45 u |
Before |
5x4 =
20 u |
|
Change |
- 2x4 =
- 8 u |
|
After |
3x4 =
12 u |
45 u |
Comparing Gillian
and Shiyun in the end |
|
$2640 less |
Gillian's salary at first is repeated. Make Gillian's salary at first the same. LCM of 4 and 5 is 20.
Amount that Gillian will have less than Shiyun in the end
= 45 u - 12 u
= 33 u
33 u = 2640
1 u = 2640 ÷ 33 = 80
Shiyun's salary
= 45 u
= 45 x 80
= $3600
Answer(s): $3600
