Calculate Week A Minus Week B

I’m trying to figure out how to do a calculation to get the difference in the totals for each week.

In the below example I want to take W44-W43 to get the difference of the values rather than the aggregate.

Hi @tristan.slater,
You can use standard calculation Time ago -> Previous period change to see the measure changes compared to the previous period.
See more here -

Here in the report you can see that I have added both Previous period and Previous period change and how the results are calculated:

Gerda //