I have an issue where I am trying to get a percentage based on the number of returns of a specific unit / the total number of units produced. I have tried many different things to get this to work. All of my data for this calculation is in one table. My data is sourced from and Excel spreadsheet that is just a query from Access that has been dumped into it. My units produced number is based on the part number in the table, as is the model name (there are multiple part numbers for the same model). To get the number of returns I am using a measure that counts the number of times a specific model has been returned. Below is a pretty generic picture of what I am trying to do.
