How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 9/10100.0*Chance in playoffs100.0*Average seed
Montreal 1 Carolina 0 +25.1
+0.3
Minnesota 2 Atlanta 0 -11.8
-0.1
Week of 9/17100.0*Chance in playoffs100.0*Average seed
Montreal 2 Edmonton 0 +20.2
+0.2
Tampa Bay 1 Minnesota 1 -8.1
-0.1
Week of 9/24100.0*Chance in playoffs100.0*Average seed
Carolina 1 Minnesota 2 Out
-0.6
Atlanta 0 Montreal 4 +28.6
+0.3
Points
Chance Will Make Playoffs