7:45
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15 minutes before 8 o'clock would be 7:45. This is because there are 60 minutes in an hour, so subtracting 15 minutes from 8 o'clock gives you 7:45.
8 hours
The term a quarter to 9 means 15 minutes before 9 o'clock, or 45 minutes after 8 o'clock; it would be written as 8:45.
8:30 plus 45 minutes equals 9:15. To add the two times together, you can convert 8:30 to 8:00 and add the 45 minutes to get 8:45. Then, adding another 30 minutes gives you a total of 9:15.
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.
((8 minutes 32 seconds) + (37 minutes 18 seconds)) + (15 second) = 46 minutes 5 seconds