How are these numbers calculated?

Big Games

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

Week of 4/14100.0*Chance in playoffs100.0*Average seed
Stealth 15 Roughnecks 11 +22.8
+1.0
Rock 8 Bandits 13 -5.5
-0.2
Swarm 17 Bandits 16 +5.1
+0.1
Rush 12 Black Wolves 13 -3.3
-0.1
Mammoth 13 Knighthawks 7 -0.4
Week of 4/22100.0*Chance in playoffs100.0*Average seed
Stealth 13 Mammoth 7 +19.4
+0.8
Bandits 7 Swarm 20 +12.3
+0.2
Knighthawks 15 Black Wolves 13 +0.7
Rush 15 Rock 10 +0.6
+0.1
Week of 4/28100.0*Chance in playoffs100.0*Average seed
Knighthawks 10 Swarm 13 In
+0.0
Mammoth 9 Rush 10 +0.4
Black Wolves 16 Stealth 17 +1.5
Games Above .500
Chance Will Make Playoffs