Subtotal bar chart with measure

What you need to do is write a new measure that returns the total revenue without the top 5 filter applied. From there it is a simple division.

So you have a top 5 list of something. You need to remove the filters on that “something”

The general pattern to do this is a measure something like this

CALCULATE([Total Revenue], ALL(Table))

where table is the one that filters your original visual by rows. So if you are showing top products, the use the products table.