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 Bears 0 Syd Ice Dogs 8 +15.6
+0.4
Syd Ice Dogs 2 Perth 8 -12.9
-0.4
Melb Ice 3 Adelaide 1 +8.2
Melb Ice 4 Adelaide 2 +6.3
Newcastle 6 Syd Bears 2 -1.5
Newcastle 5 Perth 4 -0.6
CBR 2 Melb Mustangs 4 +0.3
Week of 8/16100.0*Chance in playoffs100.0*Average seed
Perth 3 Syd Ice Dogs 6 In
+0.4
Perth 1 Syd Ice Dogs 3 +14.0
+0.2
Adelaide 6 CBR 2 -12.7
-0.1
Adelaide 5 CBR 2 -11.4
-0.1
Melb Mustangs 6 Newcastle 3 +5.6
+0.1
Week of 8/23100.0*Chance in playoffs100.0*Average seed
Syd Bears 2 CBR 3 -0.2
Points
Chance Will Make Playoffs