Question: how to calculate hours decimal?
Answer: 2 hours is 2 hours * (1 hour/ 1 hour) = 2 hours.
45 minutes is 45 minutes * (1 hour / 60 minutes) = 45/60 hours = 0.75 hours.
45 seconds is 45 seconds * (1 hour / 3600 seconds) = 45/3600 hours = 0.0125 hours.
Adding them all together we have 2 hours + 0.75 hours + 0.0125 hours = 2.7625 hours.