Erika and Wendy went shopping with a total of $435. After Erika spent
45 of her money and Wendy spent $75, the ratio of Wendy's money became 3 times as much as Erika's money. Find the ratio of Erika's money to Wendy's money at first.
| |
Erika |
Wendy |
| Before |
5 u |
3 u + 75 |
| Change |
- 4 u |
- 75 |
| After |
1 u |
|
| Comparing between Erika and Wendy in the end |
1 u |
3 u |
Total amount that Erika and Wendy had at first
= 5 u + 3 u + 75
= 8 u + 75
8 u + 75 = 435
5 u + 4 u = 435 - 75
8 u = 360
1 u = 360 ÷ 8 = 45
Amount that Erika had at first
= 5 u
= 5 x 45
= $225
Amount that Wendy had at first
= 435 - 225
= $210
At first
Erika : Wendy
225 : 210
15 : 14
Answer(s): 15 : 14
