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 6 Syd Bears 2 +3.1
+0.2
Newcastle 5 Perth 4 +2.3
+0.3
Syd Ice Dogs 2 Perth 8 +1.6
Syd Bears 0 Syd Ice Dogs 8 -1.0
Melb Ice 4 Adelaide 2 +0.4
Melb Ice 3 Adelaide 1 +0.4
+0.1
Melb Mustangs 1 Melb Ice 5 -0.3
CBR 4 Melb Mustangs 2 -0.1
Week of 8/16100.0*Chance in playoffs100.0*Average seed
Melb Mustangs 6 Newcastle 3 -8.1
-0.3
Perth 1 Syd Ice Dogs 3 Out
+0.0
Adelaide 5 CBR 2 -1.0
-0.2
Melb Ice 7 Newcastle 2 -0.1
Adelaide 6 CBR 2 -0.1
Perth 3 Syd Ice Dogs 6 +0.1
Week of 8/23None
Points
Chance Will Make Playoffs