Dynamic Measure based on selected filters/slicers

[bytheway]

This feels like an incredibly simple problem, but I'm an incredibly simple person.

I'm doing a revenue chart with one line for each year. I have a measure which compares the YoY growth ebtween years. The measure behaves when I have no slicers engaged but falls apart the second I select something in the slicer. So my question is: how do you have the measure respond to the selected slicers? I can see what the overall growth is for the whole business, but when I've got a slicer on WORKER A, I want the measure to just return the overall growth for WORKER A. The measure will be used as a tooltip on a linegraph.

Thanks for your help!