How are these numbers calculated?

Big Games

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

Week of 1/4100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Wellington 0 Sydney 2 -0.9
-0.7
+0.1
Brisbane 1 Melbourne 2 +0.7
-5.8
+0.4
Newcastle 2 Adelaide 1 -0.2
+0.0
Perth 1 Central Coast 1 +0.1
Week of 1/11100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Central Coast 1 Newcastle 2 Out
Melbourne 3 Wellington 0 +1.5
No
+0.5
Perth 3 Adelaide 2 +0.3
Week of 1/18100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Adelaide 2 Brisbane 0 -0.3
Sydney 2 Melbourne 2 +0.1
Points
Chance Will Make Playoffs