How to Calculate Cumulative Percentage

Imam01 You need something to define "previous" like a date or index. If you have that you can do this:

Cummulative Measure = 
  VAR __Index = MAX('Vehicle'[Index])
  VAR __Table = SUMMARIZE('Vehicle', [Index], [Vehicle License Plate], [Unique Vehicle ID], [Owner ID], "__PercentTrips", [% Trips with Blank Driver])
  VAR __Result = SUMX( FILTER( __Table, [Index] <= __Index ), [__PercentTrips])
RETURN
  __Result

Hi Imam01 

As Greg_Deckler  mentioned, you just need to change the [Index] to your own meaure /column name, and you can try the following measure.

If your fields are in the same table, you can try this.

Measure =
VAR a =
    ADDCOLUMNS (
        ALLSELECTED ( 'Vehicle' ),
        "Rank", [Top 10 Blank ID Vehicles Ranking],
        "%Trips", [% of Trips with Blank Driver]
    )
VAR b = [Top 10 Blank ID Vehicles Ranking]
RETURN
    SUMX (
        FILTER (
            a,
            [Vehicle License Plate]
                IN VALUES ( 'Vehicle'[Vehicle License Plate] )
                    && [Rank] <= b
        ),
        [%Trips]
    )

Best Regards!

Yolo Zhu

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