1/2
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its 1/2
0.50 of an hour is 30 minutes.
90 min are in a hour and a half90since an hour is 60 minutes and a half hour is half that (30) you just do a simple addition for your answer60+30=90 minutesThe number of mintues in a half hour are 30 minutes because a full hour is 60 minutes and if you divide it in to 2's u get 30 min!
1 hour = 3600 seconds 30 minutes = 1800 seconds 1 hour + 30 minutes = 5400 seconds
30 minutes = 1/2 hour