Please would someone be able to help me find a formula that with round a time
to the nearest 15mins.

eg: if I have a time of 11:07 this needs to round to 11:00, but 11:08 needs
to round to 11:15, 11:22 round to 11:15 but 11:23 to 11:30 and so on round
the hour.

Your help would be gratefully appreciated.
Kind regards


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