First you have to find out how many miles the horse went. The track is .25 miles for one lap. You divide the number of laps (77) by 4 to get the number of miles the horse went (19.25 miles). Then you divide the number of miles the horse went (19.25) by the number of minutes it took the horse to go that far (22.5 minutes). 19.25/22.5= 0.855 miles a minute.
