We have a custom field on an item for a preferred margin with data type percentage and set the value to 30% on a single item for testing. In the saved search, we can see the value being stored as 0.3. In the column "1 minus margin", you can see the value 0.7. The column for the "Preferred Base Price" is a Formula Numeric for {lastpurchaseprice} / (1 - {custitem_preferred_margin}). This should very simply be 177 / 0.7 = 252.86. Why does the "Error: Possible Divide by Zero" show? It is not by zero, it is divided by 0.7.