Shannon's salary to Penelope's salary is 4 : 9. If Shannon spends
57 of her salary, she will have $550 less than Penelope. How much salary does Penelope have?
| |
Shannon |
Penelope |
Comparing Shannon
and Penelope at first |
4x7 =
28 u |
9x7 =
63 u |
Before |
7x4 =
28 u |
|
Change |
- 5x4 =
- 20 u |
|
After |
2x4 =
8 u |
63 u |
Comparing Shannon
and Penelope in the end |
|
$550 less |
Shannon's salary at first is repeated. Make Shannon's salary at first the same. LCM of 4 and 7 is 28.
Amount that Shannon will have less than Penelope in the end
= 63 u - 8 u
= 55 u
55 u = 550
1 u = 550 ÷ 55 = 10
Penelope's salary
= 63 u
= 63 x 10
= $630
Answer(s): $630
