how do u solve this?

Question

one lap around the track is equal to 1/8 of a mile. a horse ran a distance of 9 laps in 2 minutes and 30 seconds. what was the horse's average speed in miles per minute

Answer 1

9(1/8) = 9/8 miles

 

(9/8)/2.5 = (9/8)(1/2.5) = 9/12 = 3/4 miles/second