Calculate column

Hi, NELfr 

According to your description , you want to " trying to create a meassure or column that indicate the % of 1 and 0 based on the grand total".

For your need , i recommend you to use the measure to realize your need.

Here are the steps you can refer to :

(1)This is my test data:

(2) We can create a measure like this:

% = DIVIDE(COUNT('Table'[activación_flag]) , CALCULATE( COUNT('Table'[activación_flag]) , ALL('Table')))

(3)Then we can put the field and the measure on the visual and we will meet your need , the result is as follows:

Thank you for your time and sharing, and thank you for your support and understanding of PowerBI! 

Best Regards,

Aniya Zhang

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