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
Melb Ice 4 Adelaide 2 +11.2
+0.5
Melb Ice 3 Adelaide 1 +5.0
+0.4
Syd Bears 0 Syd Ice Dogs 8 -3.5
-0.1
Syd Ice Dogs 2 Perth 8 +0.9
+0.1
Newcastle 6 Syd Bears 2 -0.7
Melb Mustangs 1 Melb Ice 5 In
+0.4
CBR 2 Melb Mustangs 4 +0.3
Newcastle 5 Perth 4 -0.2
CBR 4 Melb Mustangs 2 -0.1
Week of 8/16100.0*Chance in playoffs100.0*Average seed
Melb Ice 7 Newcastle 2 +0.3
Adelaide 5 CBR 2 +0.2
Melb Mustangs 6 Newcastle 3 -0.2
Adelaide 6 CBR 2 +0.2
Week of 8/23100.0*Chance in playoffs100.0*Average seed
Newcastle 1 Melb Mustangs 4 -0.2
Melb Ice 2 Perth 3 -0.2
Syd Ice Dogs 4 Melb Mustangs 3 (so)-0.2
Melb Ice 4 Perth 5 (so)+0.0
Points
Chance Will Make Playoffs