How are these numbers calculated?

Big Games

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

Week of 1/5100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Perth 2 Melbourne 2 Out
-0.8
-0.0
Newcastle 1 Central Coast 0 +0.2
-0.1
Central Coast 0 New Zealand 0 No
+0.1
Sydney 0 New Zealand 1 +5.1
-0.1
Week of 1/12100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Perth 3 Newcastle 3 -0.1
Week of 1/19None
Points
Chance Will Make Playoffs