Vanessa's salary to Cathy's salary is 5 : 9. If Vanessa spends
47 of her salary, she will have $480 less than Cathy. How much salary does Cathy have?
| |
Vanessa |
Cathy |
Comparing Vanessa
and Cathy at first |
5x7 =
35 u |
9x7 =
63 u |
Before |
7x5 =
35 u |
|
Change |
- 4x5 =
- 20 u |
|
After |
3x5 =
15 u |
63 u |
Comparing Vanessa
and Cathy in the end |
|
$480 less |
Vanessa's salary at first is repeated. Make Vanessa's salary at first the same. LCM of 5 and 7 is 35.
Amount that Vanessa will have less than Cathy in the end
= 63 u - 15 u
= 48 u
48 u = 480
1 u = 480 ÷ 48 = 10
Cathy's salary
= 63 u
= 63 x 10
= $630
Answer(s): $630
