This is the #Salesforce Trailhead challenge solution for Reports & Dashboards, Visualizing Your Data in #Salesforce Classic.
I recommend watching this video to get the most from #Salesforce Answers. https://www.youtube.com/watch?v=1JPeZypDjNw
At this time, lightning experience does not support dashboards with pie charts. As a result, no corresponding lightning experience video has been made.