How are these numbers calculated?

Big Games

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

Week of 8/9100.0*Chance in playoffs100.0*Average seed
Syd Ice Dogs 2 Perth 8 +0.9
Newcastle 5 Perth 4 +0.7
+0.2
Newcastle 6 Syd Bears 2 +0.5
+0.1
Syd Bears 0 Syd Ice Dogs 8 -0.3
Melb Ice 4 Adelaide 2 +0.2
Melb Ice 3 Adelaide 1 +0.1
+0.1
Week of 8/16100.0*Chance in playoffs100.0*Average seed
Melb Mustangs 6 Newcastle 3 -3.5
-0.2
Perth 1 Syd Ice Dogs 3 Out
+0.0
Adelaide 5 CBR 2 -0.4
-0.2
Melb Ice 7 Newcastle 2 -0.1
Week of 8/23None
Points
Chance Will Make Playoffs