Hazel's salary to Risa's salary is 3 : 7. If Hazel spends
47 of her salary, she will have $4000 less than Risa. How much salary does Risa have?
| |
Hazel |
Risa |
Comparing Hazel
and Risa at first |
3x7 =
21 u |
7x7 =
49 u |
Before |
7x3 =
21 u |
|
Change |
- 4x3 =
- 12 u |
|
After |
3x3 =
9 u |
49 u |
Comparing Hazel
and Risa in the end |
|
$4000 less |
Hazel's salary at first is repeated. Make Hazel's salary at first the same. LCM of 3 and 7 is 21.
Amount that Hazel will have less than Risa in the end
= 49 u - 9 u
= 40 u
40 u = 4000
1 u = 4000 ÷ 40 = 100
Risa's salary
= 49 u
= 49 x 100
= $4900
Answer(s): $4900
