I need to round up the result of this function to the nearest quarter hour.

Subdate(${Opps.Go to Depart},2,'HOUR')

i.e. if the result after the SubDate is Oct 24, 2018 01:35 PM

I want it to return the date/time value to be:

Oct 24, 2018 01:45 PM

Anybody have the code to do this?

Thanks!