Erika's salary to Abi's salary is 3 : 8. If Erika spends
47 of her salary, she will have $1410 less than Abi. How much salary does Abi have?
| |
Erika |
Abi |
Comparing Erika
and Abi at first |
3x7 =
21 u |
8x7 =
56 u |
Before |
7x3 =
21 u |
|
Change |
- 4x3 =
- 12 u |
|
After |
3x3 =
9 u |
56 u |
Comparing Erika
and Abi in the end |
|
$1410 less |
Erika's salary at first is repeated. Make Erika's salary at first the same. LCM of 3 and 7 is 21.
Amount that Erika will have less than Abi in the end
= 56 u - 9 u
= 47 u
47 u = 1410
1 u = 1410 ÷ 47 = 30
Abi's salary
= 56 u
= 56 x 30
= $1680
Answer(s): $1680
