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
Newcastle 5 Perth 4 -1.1
-0.3
Syd Bears 0 Syd Ice Dogs 8 -0.3
Melb Ice 4 Adelaide 2 +0.2
Syd Ice Dogs 2 Perth 8 +0.1
+0.1
Melb Ice 3 Adelaide 1 +0.1
Week of 8/16100.0*Chance in playoffs100.0*Average seed
Adelaide 5 CBR 2 Out
Perth 1 Syd Ice Dogs 3 Out
-0.1
Melb Mustangs 6 Newcastle 3 +0.1
Perth 3 Syd Ice Dogs 6 -0.1
Week of 8/23None
Points
Chance Will Make Playoffs