Calculated Measure percent not blank

Kinda walking in on the middle of this Anonymous but see if this helps. First of all, what is a "blank?" The data you gave had spaces, but that is understandable, tables in this forum cannot understand the difference between spaces, empty fields "", or nulls.

So, I forced the empty things to be null - a special value that will compare against BLANK() in DAX. This is what it looks like in Power Query. Note the word null for the blank areas.

Here is the M code. You might have to replace " " (there is a space there) or "" with null. When doing "", just leave the first box blank in the Replace Values box. Then use the lower case word null in the 2nd box.

This is tjhe M code:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUQopKk0FUgpAHKoUqxOtZARkuSXmFINEHcEyIFFjJFEFuKgJwgA3/IKmWPWboToAj6A5kv5IuKgFQqkXRDAWAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ID = _t, #"MVA?" = _t, #"Insurance 1" = _t, #"Insurance 2" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"MVA?", type logical}}),
    #"Replaced Value" = Table.ReplaceValue(#"Changed Type"," ",null,Replacer.ReplaceValue,{"Insurance 1", "Insurance 2"})
in
    #"Replaced Value"

Now, for a card, the below DAX will return 4. In another visual, you may have filter context to deal with.

CALCULATE(
    COUNTROWS( 'Table' ),
    'Table'[MVA?]
        = TRUE()
        && ( 'Table'[Insurance 1] )
            <> BLANK()
        || 'Table'[Insurance 2]
            <> BLANK()
)

Visually in the DAX model, you cannot tell if Insurance 1 has a space, is empty, often represented by "", or is null. So use Power Query to validate what is there, then adjust your DAX accordingly. Nulls are easier to deal with because you know what they are.

Also note that the MVA field for me is a real true/false value, not TRUE/FALSE as text. Adjust the DAX accordingly.

If that doesn't answer your question, please tell me what the answer should be and how I should arrive at it.