How are these numbers calculated?

Big Games

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

Week of 1/9100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Sydney 1 Wellington 0 +2.4
No
+0.4
Adelaide 0 Brisbane 0 -1.1
Central Coast 3 Brisbane 4 -0.7
Adelaide 2 Newcastle 0 -2.0
+0.0
Perth 3 Melbourne 2 +0.4
-0.3
Week of 1/16100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Brisbane 3 Sydney 1 Out
-0.4
Melbourne 3 Central Coast 0 +2.9
Newcastle 2 Perth 1 +0.3
Wellington 1 Adelaide 1 -0.1
Week of 1/23100.0*Chance in playoffs100.0*Relegated100.0*Average seed
Brisbane 4 Perth 2 +0.2
Points
Chance Will Make Playoffs