creating Data Quality Dashboard

Hi , moh3azzam 

According to your description, you want to calculate the percentage of the column.

Here are the steps you can refer to :
(1)This is my test data:

(2)We can click "New Table" to create a table :

Table 2 = UNION(UNION( ADDCOLUMNS( SELECTCOLUMNS('Table',"validColumn",[Valid1]) , "ColumnName","Cutomer Full Name"),
 ADDCOLUMNS( SELECTCOLUMNS('Table',"validColumn",[Valid2]) , "ColumnName","Address")),
  ADDCOLUMNS( SELECTCOLUMNS('Table',"validColumn",[Valid3]) , "ColumnName","Industry Code"))

(3)Then we can create two measures :

Valid = DIVIDE( CALCULATE( COUNT('Table 2'[validColumn]), 'Table 2'[validColumn] = "valid") , COUNT('Table 2'[validColumn]))

Not Valid = DIVIDE( CALCULATE( COUNT('Table 2'[validColumn]), 'Table 2'[validColumn] = "not valid") , COUNT('Table 2'[validColumn]))

Then we can put the fields we need on the visual and we can meet your need:

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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