How do you change a fraction of hours into a decimal?

Answer 1

Take just the decimal, and multiply it by 60. So if you have 3.5 hours, you do 0.5 x 60 to get 30 minutes. If you have 6.48 hours, you do 0.48 x 60 to get 28.8 minutes, for which you can do the same thing with the decimal to get seconds (0.8 x 60 = 48 seconds)