Try the following field:
RUNNING_SUM(SUM([# Actual Calls]))
RUNNING_SUM(SUM([# call objective YTD]))
I've also attached a workbook. Should help you see what I've done and confirm its validity. I assume in your attempted the order of operations got mixed up is all. Looks like you did
RUNNING_SUM(SUM(actual calls) / SUM(call objective))
DivisionRunningTotal.twbx 7.2 KB
Perfect! Thank you Carl!