Roshel's salary to Fiona's salary is 3 : 7. If Roshel spends
57 of her salary, she will have $3440 less than Fiona. How much salary does Fiona have?
| |
Roshel |
Fiona |
Comparing Roshel
and Fiona at first |
3x7 =
21 u |
7x7 =
49 u |
Before |
7x3 =
21 u |
|
Change |
- 5x3 =
- 15 u |
|
After |
2x3 =
6 u |
49 u |
Comparing Roshel
and Fiona in the end |
|
$3440 less |
Roshel's salary at first is repeated. Make Roshel's salary at first the same. LCM of 3 and 7 is 21.
Amount that Roshel will have less than Fiona in the end
= 49 u - 6 u
= 43 u
43 u = 3440
1 u = 3440 ÷ 43 = 80
Fiona's salary
= 49 u
= 49 x 80
= $3920
Answer(s): $3920
