To decimal: 4.4 hoursTo fraction: 4 2/5 hours
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Expressed as a decimal fraction, 2 hours 45 minutes is equal to 2.75 hours.
It is: 2 hours and 15 minutes = 2.25 hours as a decimal
0.666 hours
Three hours and 15 minutes can be written as 3.25 hours or 3 1/4 hours.
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)