Calculate Percentages In A Hierarchical Form In Power BI

HI Anonymous 

This measure should do the trick. I am assuming your data is coming from one table (if yes, please condider re-wiring into a dimensional model). 

Percentage  =
VAR countryInScope =
    NOT ISINSCOPE ( 'Table'[Country] )
VAR result =
    DIVIDE (
        SUM ( 'Table'[Amount] ),
        IF (
            countryInScope,
            CALCULATE ( SUM ( 'Table'[Amount] ), REMOVEFILTERS () ),
            CALCULATE ( SUM ( 'Table'[Amount] ), ALLEXCEPT ( 'Table', 'Table'[Client] ) )
        )
    )
RETURN
    result

 
You are welcome to create a separate measure for Sales Sales = SUM('Table'[Amount]) and use it in the measure above instead of repeating the SUM func. 

If I answered your question, please mark my post as a solution. Thank you!