Risa's salary to Nora's salary is 5 : 8. If Risa spends
57 of her salary, she will have $920 less than Nora. How much salary does Nora have?
| |
Risa |
Nora |
Comparing Risa
and Nora at first |
5x7 =
35 u |
8x7 =
56 u |
Before |
7x5 =
35 u |
|
Change |
- 5x5 =
- 25 u |
|
After |
2x5 =
10 u |
56 u |
Comparing Risa
and Nora in the end |
|
$920 less |
Risa's salary at first is repeated. Make Risa's salary at first the same. LCM of 5 and 7 is 35.
Amount that Risa will have less than Nora in the end
= 56 u - 10 u
= 46 u
46 u = 920
1 u = 920 ÷ 46 = 20
Nora's salary
= 56 u
= 56 x 20
= $1120
Answer(s): $1120
