MS Access How to detect when a record is actually deleted

This is driving me crazy. I have a form with a subform. On the subform, each record has a percentage field. On the main form I have a text box showing the total percentage. On my Adds and Updates it recalculates exactly as expected. BUT I can't seem to get it to work after deleting a record on the subform.

What I want is, after a deletion (after the record is actually deleted!) for the text box on the main form to recalculate. I'm not using Delete Confirm, so please keep that in mind. I've tried using a flag that triggers on deletion and then check that flag during the On Current, but that didn't work either.

There must be a way to do this. I think I've done it before, but can't remember.

At what point AFTER a deletion can I run a procedure that will calculate a field on a table.

Any help would be greatly appreciated.

Thanks,
Eddie