Answer:
Unit rate defined as the rates are expressed as a quantity 1 such as 2 miles per hour or 5 meter per second.
As per the statement:
Karleigh walks 5/8 mile to school every day.
by definition of unit rate:

We have to find how far does she walk to school in 5 days.

Substitute the given values.
Therefore,
miles far does she walk to school in 5 days