Fanny's salary to Winnie's salary is 3 : 7. If Fanny spends
25 of her salary, she will have $780 less than Winnie. How much salary does Winnie have?
| |
Fanny |
Winnie |
Comparing Fanny
and Winnie at first |
3x5 =
15 u |
7x5 =
35 u |
Before |
5x3 =
15 u |
|
Change |
- 2x3 =
- 6 u |
|
After |
3x3 =
9 u |
35 u |
Comparing Fanny
and Winnie in the end |
|
$780 less |
Fanny's salary at first is repeated. Make Fanny's salary at first the same. LCM of 3 and 5 is 15.
Amount that Fanny will have less than Winnie in the end
= 35 u - 9 u
= 26 u
26 u = 780
1 u = 780 ÷ 26 = 30
Winnie's salary
= 35 u
= 35 x 30
= $1050
Answer(s): $1050
