How are these numbers calculated?

Big Games

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

Week of 4/6100.0*Chance in playoffs100.0*Average seed
Roughnecks 11 Stealth 12 In
+0.9
Rush 7 Mammoth 9 -0.1
+0.1
Swarm 21 Bandits 7 -0.1
Knighthawks 14 Wings 7 -0.1
Wings 15 Swarm 13 +0.1
Week of 4/13100.0*Chance in playoffs100.0*Average seed
Stealth 10 Bandits 15 -0.6
Rush 14 Knighthawks 10 +0.2
Roughnecks 14 Knighthawks 15 +0.1
Mammoth 12 Swarm 17 -0.1
Week of 4/20100.0*Chance in playoffs100.0*Average seed
Stealth 17 Wings 13 +0.8
Rush 11 Roughnecks 12 -0.3
Swarm 14 Mammoth 16 +0.3
Bandits 9 Knighthawks 10 -0.2
Games Above .500
Chance Will Make Playoffs