Is this meant to just be shared with others as an example, or did you have an outstanding question about it? If its an example for the community, we can move it over to "Community Canvas" or another space on the Community that is better suited for example workbooks. Thanks for posting!
If this isn't a question then it needs to be moved to the The specified item was not found. . I don't have permission to make this particular move.
If this is put into the workbook library then I'd like the languaging to be changed slightly to indicate that there are different needs for display. This post uses the term "error" and it's really just a different use case. I've had a number of use cases where all the decimals really did need to be carried forward and rounding at the end was desired.
Tableau's default behavior is to carry all the available decimals of precision calculation through all the calculations and only round for display purposes. This can work well in many situations however it is not always desirable. For example [description of the issue]. In that case then the rounding can be done inside the calculation as in this formula [describe formula].
Thanks Toby and Matt, i didn't know until now that there is such a place for these kinds of posts (which is meant as a tip).
Moving it now.