DAX Function challenge

[AngelPellejero]

Hi everyone
I am trying to create a DAX function to sum percentages per week of the student attendance to the modules, at the moment I have a measure to calculate the percentage per each week and per each module. Now I need to sum the attendance of all modules per week.

I mean something like this

 

I will apreciated any help, thanks in advance

Kind regards

[Greg_Deckler]

Check out the technique I used here with the SUMMARIZE:

https://community.powerbi.com/t5/Community-Blog/Design-Pattern-Groups-and-Super-Groups/ba-p/138149