Final answer:
The unit rate as a complex fraction for walking 1/4 mile in 1/5 hour is 5/4 miles per hour, which is equivalent to 1.25 miles per hour.
Step-by-step explanation:
If a person walks 1/4 mile in 1/5 hour, the unit rate as a complex fraction would be calculated as follows:
To find the unit rate, we divide the distance by the time:
because

Therefore, the complex fraction for the unit rate is 5/4 miles per hour, which simplifies to 1.25 miles per hour.