5*60+1/2*60=300+30=330.
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There are 5 half hours in 2.5 hours
5.5 = five and a half hours or 5 hours 30 minutes
There are 150 minutes in total. To convert this into half hours, we need to divide by 30 (since there are 30 minutes in a half hour). Therefore, 150 minutes divided by 30 equals 5 half hours.
2 hours, 40 minutes
7 and one half hours = 15 half hours. There are 24 hours in a day, so there are 48 half hours in a day. Therefore the answer is 15/48, which can then be reduced to 5/16.