If Blank (because value does not exist in linked table)

[Mainer04401]

I have two tables of data that are linked together by a store list.  All stores are listed in data table #1, but not all stores are listed in data table #2.  Let's say I have an expression like:

Discount % of Sales = divide(sum(Table2[Discounts]), sum(Table1[Sales], 0)

If the store does not exist in table 2 (discounts table), I want the output to be "N/A" instead of (Blank).  However, when I try:
IF(ISBLANK(sum(Table2[Discounts],"N/A", divide(sum(Table2[Discounts]), sum(Table1[Sales], 0) ...  It doesn't work.  I still have blanks instead of N/A.  

[dax]

Hi @Mainer04401 , 

I am not clear about your requirement, if possible could you please inform me more detailed information(such as your expected output and your sample data (by OneDrive for Business))? Then I will help you more correctly.

Please do mask sensitive data before uploading.

Thanks for your understanding and support.
Best Regards,
Zoe Zhi

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[amitchandak]

Try like this :IF(ISBLANK(sum(Table2[Discounts])),"N/A", divide(sum(Table2[Discounts]), sum(Table1[Sales]), 0) &"")