Jane's salary to Irene's salary is 4 : 7. If Jane spends
25 of her salary, Irene will have $690 more than her. How much salary does Jane have?
| |
Jane |
Irene |
Comparing Jane
and Irene at first |
4x5 =
20 u |
7x5 =
35 u |
Before |
5x4 =
20 u |
|
Change |
- 2x4 =
- 8 u |
|
After |
3x4 =
12 u |
35 u |
Comparing Jane
and Irene in the end |
|
$690 more |
Jane's salary at first is repeated. Make Jane's salary at first the same. LCM of 4 and 5 is 20.
Amount that Irene will have more than Jane in the end
= 35 u - 12 u
= 23 u
23 u = 690
1 u = 690 ÷ 23 = 30
Jane's salary
= 20 u
= 20 x 30
= $600
Answer(s): $600
