DAX Validity % (Rows Passing a Rule) Measure

Expresses rows that satisfy a validation rule as a percentage of total rows.

Data Quality and GovernanceIntermediatevaliditydata qualitypercentage

DAX code

Validity % =
VAR ValidRows = COUNTROWS(FILTER('Sales', 'Sales'[Amount] >= 0 && NOT ISBLANK('Sales'[CustomerID])))
RETURN
    DIVIDE(ValidRows, COUNTROWS('Sales'))

Notes

Replace the condition inside FILTER with whatever business rule defines a valid row in your data.

Requirements

Any table with a rule that defines a valid row.

How to use this measure

In Power BI Desktop, select the table that should hold the measure and choose New measure on the ribbon.
Paste the code, then replace the placeholder table and column names with your own. The My table names fields above do this for you.
Run it through the DAX Formatter if you want it laid out in your team's style.

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More DAX resources

Browse all 175 measures in the Power BI DAX Measures Library, or search the library for something similar to Validity % (Rows Passing a Rule).