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jhlatinia's avatar
jhlatinia
New Member
3 years ago
Solved

Average between two columns not correct

Hello, I've been trying to calculate the average of the division of 2 columns in PowerBi Desktop and not receive the right results. As you can see the column CTR is returning 0,66% for the fi...
Need Help
  • v-jianboli-msft's avatar
    v-jianboli-msft
    3 years ago

    Hi jhlatinia ,

     

    The result you get is incorrect is because it is the sum of all rows. In other words, they calculate the percentage of each row first and then sum it, which gives a different result than summing and then calculating the percentage.

    Please try:

    CTR = 
VAR _a =
    SUMMARIZE (
        'Table',
        'Table'[Campaign Group Name],
        "CTR",
            DIVIDE (
                CALCULATE (
                    SUM ( 'Table'[Clicks] ),
                    FILTER (
                        'Table',
                        [Campaign Group Name] = EARLIER ( 'Table'[Campaign Group Name] )
                    )
                ),
                CALCULATE (
                    SUM ( 'Table'[Impressions] ),
                    FILTER (
                        'Table',
                        [Campaign Group Name] = EARLIER ( 'Table'[Campaign Group Name] )
                    )
                )
            )
    )
RETURN
    AVERAGEX ( _a, [CTR] )

    Final output:

    Best Regards,

    Jianbo Li

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

v-jianboli-msft's avatar
v-jianboli-msft
Community Support
3 years ago

Hi jhlatinia ,

 

Are you trying to calculate the average of the CTR?

Here is my sample:

Please try:

Measure =
VAR _a =
    SUMMARIZE (
        'LinkedInAds',
        LinkedInAds[Group Name],
        "CTR",
            DIVIDE (
                CALCULATE (
                    SUM ( LinkedInAds[Clicks] ),
                    FILTER ( 'LinkedInAds', [Group Name] = EARLIER ( LinkedInAds[Group Name] ) )
                ),
                CALCULATE (
                    SUM ( LinkedInAds[Impressions] ),
                    FILTER ( 'LinkedInAds', [Group Name] = EARLIER ( LinkedInAds[Group Name] ) )
                )
            )
    )
RETURN
    AVERAGEX ( _a, [CTR] )

Final output:

Best Regards,

Jianbo Li

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

  • jhlatinia's avatar
    jhlatinia
    New Member
    3 years ago

    The measure look right, may I had, that Impressions or clicks are the sum of each lines of the last 7 days.

    Meaning, I filtered by Start Date which doesn't show in the image, does it change the measure?

     

    Sorry I'm quite new to all of this! And thank you for your help, really appriciated :).