Creating Percentage column inside matrix

Thank you for your reply!

I can't do that as Actual isnt a measure - its a column I've created using filters and the built in count function. Im looking for way to be able to do your suggestion! Hopefully my image below explains my problem a little better. 

I am trying to recreate 'Count of Meeting Type' (actual in my other image) as a measure/calulated column so that I can create the percentage as per your suggestion. What I need is something that can count the times meeting type 'Regular Progress' occured for each advisor. 

Thanks for all your help so far!