Answer:
Manuel has the greatest ration of minutes spent on resistance to minutes spent on cardio.
Explanation:
Alex - 24:30 is simplified to 4:5 (decimal: 0.8)
Carisa - 15:20 is simplified to 3:4 (decimal: 0.75)
Manuel - 14:15 cannot be simplified - (decimal: 0.9333333333)
Manuel's ratio is greater than the others.