2 min/1 hour = 2 min/60 min = 1/30
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You have to divide it by something. As a fraction of an hour, 40 minutes is 40 / 60 = 2/3 hour.
There are 60 minutes in an hour Hence as a fraction 8 minutes is 8/60 Cancel down by '4' 8/60 = 2/15 is the fraction an an hour.
30 minutes = 1/2 hour
2/3 How to find this? Multiply 40 minutes by (1 hour / 60 minutes), which has a value of 1. 40 minutes * (1 hour / 60 minutes) = 40/60 hours = 2/3 hours
Fraction of one hour is 45 minutes is 0.750