Ron walks 0.5 mile on the track in 10 minutes. stevie walks 0.25 mile on the track in 6 minutes. find the unit for each walker in miles per hour. who is the faster walker?

Ron walks 0.5 mile on the track in 10 minutes.
Unit rate = 0.5 miles per 10 minutes
Solve:
=> 0.5 miles / 10 minutes = 0.05 miles per minute
Stevie walks 0.25 mile on the track in 6 minutes.
Unit rate = 0.25 miles for 6 minutes
Solve
=> 0.25 miles / 6 minutes = 0.042 miles per minutes
Who walks faster than the 2 of them?
=> 0.05 miles / m  is greater than 0.042 miles per minute
Thus, Ron walks faster than Stevie

The answer that i got was 8/3