Get total sum Help!

SilviaM This looks like a measure totals problem. Very common. See my post about it here: https://community.powerbi.com/t5/DAX-Commands-and-Tips/Dealing-with-Measure-Totals/td-p/63376

Also, this Quick Measure, Measure Totals, The Final Word should get you what you need:
https://community.powerbi.com/t5/Quick-Measures-Gallery/Measure-Totals-The-Final-Word/m-p/547907

Hi SilviaM 

will it help? the sample file attached below.

Best Regards,

Community Support Team _Tang

If this post helps, please consider Accept it as the solution to help the other members find it more quickly.

Does this work?

New Rev by WBS =
SUMX (
    'Table',
    CALCULATE (
        IF (
            MAX ( 'Table'[Area] ) = "Servers",
            DIVIDE ( SUM ( 'Table'[sum of Rev] ), 2 ),
            SUM ( 'Table'[sum of Rev] )
        )
    )
)

and

% of Revenue =
VAR total =
    CALCULATE (
        [New Rev by WBS],
        FILTER ( ALL ( 'Table' ), 'Table'[Area] <> "Servers" )
    )
RETURN
    IF (
        MAX ( 'Table'[Area] ) = "Servers",
        BLANK (),
        IF (
            ISINSCOPE ( 'Table'[WBS] ),
            DIVIDE ( [New Rev by WBS], total ),
            DIVIDE ( DIVIDE ( [New Rev by WBS], 2 ), total )
        )
    )

to get