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 -25.0
-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 In
+0.6
Atlanta 0 Montreal 4 -28.6
-0.3
Points
Chance Will Make Playoffs