Greg has driven for 2 1/4 hours. Diana has driven for 3 1/5 hours, Abby has driven for 1 1/2 hours, and Jason has driven for 2 1/60 hours how many hours have they driven all together?

Step-by-step explanation:

Greg has driven for 2 1/4 hours. Converting 2 1/4 hours to improper fraction, it becomes 9/4 hours.

Diana has driven for 3 1/5 hours. Converting 3 1/5 hours to improper fraction, it becomes 16/5 hours.

Abby has driven for 1 1/2 hours. Converting 1 1/2 hours to improper fraction, it becomes 3/2 hours.

Jason has driven for 2 1/60 hours. Converting 2 1/60 hours to improper fraction, it becomes 121/60 hours.

Total number of hours driven is

9/4 + 16/5 + 3/2 + 121/60

Taking 60 as the LCM and multiplying through by 60, it becomes

(135 + 192 + 90 + 121) / 60 = 538/60

Converting to mixed fraction, it becomes

8 58/60 hours