Dividing a timestamp by a Number

[QlikSenseUser2]

I'm trying to divide timestamp by a number and get day, hour, and minute results. I currently have 

Interval(END_DATE_TIME-WO_DATE_TIME,'hh: mm')/Sum([WO Count])  this give me a number I need it the be in DD MM HH format

[rwunderlich]

If there is a END_DATE_TIME for every counted workorder, you might simplify this as 

Interval( Avg(END_DATE_TIME-WO_DATE_TIME) , 'd mm hh')

-Rob