There’s no need to call this at all. We’re already setting the progress bar percent below… calling it will revert the bar to the incorrect value you had before 
Besides, you’re pulling wrong value in that update (not the one after division). You can skip this completely. If you call it the way you do now, you will override the progress with this, as mentioned before.
And you can also skip setting up Enemy reference in the widget. There’s generally no need for that.
It’s much more efficient for the actor to push data into the widget.