IIF function and Dcount function

K

Kaylen

I have a table with fields headings in
numbers. The data in the fields is Y, N, or N/A. I want to calculate the
percentage of the count of Y over the count of Y and N, exclude N/A in the
denominator. But first I needed to filter out a certain selection in the
table only. That is why I made a query called "UM"( to filter out records
entered on certain date only). Now I want to calculate the number of Y/(N+Y)
based on data filtered by the query. I learned that you can't calculate if
the query has a parameter, or could you? The formula I use to calulate the Y
and N of field 13 in the query UM is

=DCount("[UM]![13]","UM","[UM]![13]='Y'")/(DCount("
[UM]![13]","UM","[UM]![13]='Y'")+DCount(" [UM]![13]","UM","[UM]![13]='N'"))

which works fine until all the data is if that field is "N/A", neither "Y'
or "N". Now I need a fomula that returns "N/A" if this is the case instead of
returning an error message. Please please help......
 

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