Jane's salary to Kathy's salary is 4 : 9. If Jane spends
25 of her salary, she will have $2310 less than Kathy. How much salary does Kathy have?
| |
Jane |
Kathy |
Comparing Jane
and Kathy at first |
4x5 =
20 u |
9x5 =
45 u |
Before |
5x4 =
20 u |
|
Change |
- 2x4 =
- 8 u |
|
After |
3x4 =
12 u |
45 u |
Comparing Jane
and Kathy in the end |
|
$2310 less |
Jane's salary at first is repeated. Make Jane's salary at first the same. LCM of 4 and 5 is 20.
Amount that Jane will have less than Kathy in the end
= 45 u - 12 u
= 33 u
33 u = 2310
1 u = 2310 ÷ 33 = 70
Kathy's salary
= 45 u
= 45 x 70
= $3150
Answer(s): $3150
