It is 50%
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25 percent = 15 minutes50 percent = 30 minutes75 percent = 45 minutes100 percent = 60 minutes
There are 30 minutes in half an hour and 15 minutes in a quarter of an hour
One hour is 60 minutes so 30 minutes is one-half of an hour.
Four minutes is about 6.67% of an hour.
1 hour is 60 minutes. 60 minutes + 30 minutes = 90 minutes