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One hour consists of 60 minutes. Therefore, our fraction we need is 48/60.If we put 48/60 into a calculator, we obtain 0.8.0.8 as a fraction of 1 is 4/5. Thus, 48 minutes is 4/5 of 60.A good knowledge of the 12 times table removes the need for the calculator in thus example (12,24,36,48,60...).
Fraction of one hour is 45 minutes is 0.750
Fifteen minutes as a quarter of an hour.
There are 60 minutes in an hour, so to calculate the total number of minutes in 48 hours, you would multiply 60 by 48. This equals 2,880 minutes.
You have to divide it by something. As a fraction of an hour, 40 minutes is 40 / 60 = 2/3 hour.