Calculating Share in Segment

Hi,

T have the Matrix below. First photo the Matrix is collapsed in the second it is expanded. The issue is regarding the last column. In the first photo I'm happy with the lines summing up to 100, but when I expand the Matrix I would like to see the red lines summing up to 100

I've tried different measures, but can't get my head around it.

I really hope you can help!

Br Kent