There are 900 seconds in 15 minutes. (15 minutes is a quarter of an hour) You find this out by multiplying 60 (seconds in a minutes) by 15 (minutes).....HOPE THIS HELPED! :)
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There are 15 seconds in a quarter of a minute.
Hourly fractions are minutes (1/60th), and seconds (1/3600th). Also, common time references are quarters (quarter of, quarter to, or quarter past the hour) and halves (half past the hour).
There are 5400 seconds in an hour and a half.
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