Answer:
$25
Explanation:
Let's first subtract the savings account
87.80 - 37.80 = $50
Which means after 10 weeks, she saves $50
$50/10weeks = $5/1 week
Now they save 20% of the route. Which means $5 is 20% of the route.
To get to 100% we multiply 20% by 5.
That means we multiply the $5 by 5 also, giving us $25.