Subcategory as % of category
Solution 1:
Try using the following measure:
% of Part =
VAR __a = IF( ISBLANK( [Code qty]), BLANK(), CALCULATE([Code qty], ALLSELECTED(Codes_lookup[Code]) ) )
VAR __b = [Code qty]
VAR div = DIVIDE(__b, __a, 0 )
Return div
I got the expected result: