title: PERCENT DIFFERENCE FROM calculation
body: <p>In Tableau if you do a "PERCENT DIFFERNCE FROM" calculation there is a sign issue</p>
  
  <p>the typical % diff calculation is (EndingValue - Beginning Value)/Beginning Value so if you have negative numbers like</p>
  
  <pre><code> (-41- (-40))/-40  = 2.5%  
  </code></pre>
  
  <p>but in Tableau you will see -2.5%. Why is that? Can it be changed?</p>