One again Matt Lutton and Joe Mako take to the Tableau Community Forum to answer a question.
This video's question is 'Difference in % from total %': http://community.tableausoftware.com/message/300786
This is a relatively short video compared to our prior two. We talk about parsing the parsing question, finding the content that is directly related to the question at hand, and breaking the problem down into the smallest pieces. We step through creating multiple table calculations, each with the same formula but different Compute Using settings, and pull them all together in a final calculated field to generate the desired results.
We welcome your feedback, and please recommended questions you think we should make videos for :)
Thanks and Enjoy!