How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Chance in playoffs100.0*Promotion100.0*Average seed
Serbia 2 Montenegro 1 +42.6
+42.6
+2.5
Montenegro 0 Romania 1 -39.1
-39.1
-0.8
Serbia 4 Lithuania 1 In
Yes
+1.8
Romania 3 Lithuania 0 -11.8
-11.8
-0.5
Greece 0 Estonia 1 +0.1
Hungary 2 Finland 0 +0.2
Cyprus 0 Norway 2 -0.2
Scotland 3 Israel 2 -0.1
Albania 0 Scotland 4 -0.1
Bulgaria 1 Slovenia 1 +0.0
Points
Chance Will Make Playoffs