Pamela's salary to Erika's salary is 2 : 7. If Pamela spends
57 of her salary, she will have $3600 less than Erika. How much salary does Erika have?
| |
Pamela |
Erika |
Comparing Pamela
and Erika at first |
2x7 =
14 u |
7x7 =
49 u |
Before |
7x2 =
14 u |
|
Change |
- 5x2 =
- 10 u |
|
After |
2x2 =
4 u |
49 u |
Comparing Pamela
and Erika in the end |
|
$3600 less |
Pamela's salary at first is repeated. Make Pamela's salary at first the same. LCM of 2 and 7 is 14.
Amount that Pamela will have less than Erika in the end
= 49 u - 4 u
= 45 u
45 u = 3600
1 u = 3600 ÷ 45 = 80
Erika's salary
= 49 u
= 49 x 80
= $3920
Answer(s): $3920
