Getting percent of parent in a dimension without a hierarchy is quite simple. But to get percent of parent in a hierarchy with several levels you will have to add some more code. In the current version of DAX you will have to write code for each level.

My sample query will only work for the hierarchy in the “Geography” dimension called “Geography”.

Then I will add 2 calculated measures to my model.

ParentSalesEmployee :=
IF (
    ISFILTERED ( 'Geography'[City] );
    CALCULATE (
        SUM ( [Order Quantity] );
        ALL ( 'Geography'[City] )
    );
    IF (
        ISFILTERED ( 'Geography'[State Province Name] );
        CALCULATE (
            SUM ( [Order Quantity] );
            ALL ( 'Geography'[State Province Name] )
        );
        CALCULATE (
            SUM ( [Order Quantity] );
            ALL ( 'Geography'[Country Region Name] )
        )
    )
)

And then

Ratio To Parent:=Sum([Order Quantity]) / [ParentSalesEmployee]

And the result will looks like this:

I hope hierachy handling will become better in next version of DAX…