Matrix Table Difference Between two dates with non-date values

[common763]

I have a matrix table with VALUE A.  I have it filtered to show the last two days of the data.  Below is what it looks like.

7/14/2020        7/13/2020

20                     25

Both numbers are from one specific selection called Active. 

I want to subtract Active (7/14/2020)  - Active(7/13/2020) and have the difference shown next to the two dates.

Is there an easy way to do this?  I am having a problem getting this done.

[lbendlin]

you cannot show the difference "next to the values" in the same visual. You can create a measure that shows the difference as a new value in the second row (or stacked if you select "show values on rows". You will get two differences, one valid one and one empty one.