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*Average seed
Adelaide 2 Newcastle 0 +2.2
+0.4
Perth 3 Melbourne 2 In
+0.2
Sydney 1 Wellington 0 In
Adelaide 0 Brisbane 0 +0.1
Week of 1/16100.0*Chance in playoffs100.0*Average seed
Melbourne 3 Central Coast 0 -0.2
Wellington 1 Adelaide 1 -0.2
Brisbane 3 Sydney 1 -0.1
Week of 1/23100.0*Chance in playoffs100.0*Average seed
Central Coast 0 Adelaide 1 +0.4
Melbourne 2 Wellington 0 -0.3
Brisbane 4 Perth 2 -0.2
Points
Chance Will Make Playoffs