Mary's salary to Gabby's salary is 4 : 9. If Mary spends
57 of her salary, she will have $5500 less than Gabby. How much salary does Gabby have?
| |
Mary |
Gabby |
Comparing Mary
and Gabby at first |
4x7 =
28 u |
9x7 =
63 u |
Before |
7x4 =
28 u |
|
Change |
- 5x4 =
- 20 u |
|
After |
2x4 =
8 u |
63 u |
Comparing Mary
and Gabby in the end |
|
$5500 less |
Mary's salary at first is repeated. Make Mary's salary at first the same. LCM of 4 and 7 is 28.
Amount that Mary will have less than Gabby in the end
= 63 u - 8 u
= 55 u
55 u = 5500
1 u = 5500 ÷ 55 = 100
Gabby's salary
= 63 u
= 63 x 100
= $6300
Answer(s): $6300
