Answer:
Unit rates defined as the rates are expressed as the quantity 1 such as 3 miles per second or 5 kilometers per hour.
Given the statement: Four laps around the trail is a distance of 1 mile.

substitute the given values we have;
= 4 laps
We have to find the how many laps does it take to walk 3/4 of a mile
By definition of unit rate:
Number of laps =

=

Therefore, 3 laps does it take to walk 3/4 of a mile.