How are these numbers calculated?

Big Games

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

Week of 11/25100.0*Chance in playoffs100.0*Average seed
Arsenal 2 Dortmund 0 In
+0.7
Anderlecht 2 Galatasaray 0 -7.0
-0.1
Week of 12/9100.0*Chance in playoffs100.0*Average seed
Galatasaray 1 Arsenal 4 +0.2
Dortmund 1 Anderlecht 1 +0.1
Points
Chance Will Make Playoffs