Can I change data labels on a pivot chart (that has slicers)

Hi I have this pivot chart (linked to pivot table) and has slicers.

My boss would like the percentage as a data label on each pair, and I don't know if that's possible or how to do it?

Its hopefully something really simple, I have looked in my Excel 2016 book an on the web an I can see how to edit a stand alone table, but mine is governed by the slicers so would need to change depending who was looking at what on the graph if that makes sense?

Here's a screen shot:

label names.jpg

Thank you so much in advance :-)

Clair :-)