Calculated Percentage Column in a Matrix

I am looking to add a calculated column to a matrix

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I want to add a colyumn to the far right of the total.  This would show a % of the Suitable and Suitable Admin columns divided by the total i.e top row sum(16+16)/34*100 =94.12%

The data table (Power Bi ADQ Report 2 contains a column called Aligned case grade which forms the column on the Matrix and a Column from a seperate table Head of Sales.  The seperate table is joined

I new to Power Bi and would appreciate any help.

Many Thanks

Ted