title: Using Power BI Desktop, how can I present Time Duration in a matrix that converts it to decimal?
body: <p>I have Begin Date and End Date in my data file (Excel), then in PowerQuery I add a column where I simply subtract the Begin Date from End Date to create a new column "Import Time", change the result's data type to Duration and in PowerQuery, the column correctly shows the difference expressed in Day:Hour:Minute:Seconds. However, in a report, I need to show the average not of an entire column, but of groups of values in a matrix based on the entire table. In other words, I'm looking for a table that shows columns for Category Name, Avg. Duration and Max Duration, with rows showing the results for each unique Category.</p>
  
  <p>The problem is that when I drag a table field in to the Visualizations Value area and change to Average, it expresses the result as a decimal, and I can't figure out how to show the date / time equivalent. I thought I might have to multiply by 3,600 since the result might be shown in milliseconds, but that didn't work. Any thoughts?</p>