How are these numbers calculated?

Big Games

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

Week of 4/17100.0*Chance in playoffs100.0*Average seed
Swarm 6 Roughnecks 10 +22.7
+0.8
Rock 15 Black Wolves 12 +3.0
+0.2
Stealth 9 Knighthawks 13 +0.8
+0.1
Week of 4/25100.0*Chance in playoffs100.0*Average seed
Knighthawks 14 Black Wolves 6 +3.1
+0.1
Swarm 12 Rush 16 +0.1
Black Wolves 9 Bandits 20 +0.1
Week of 5/1100.0*Chance in playoffs100.0*Average seed
Stealth 13 Roughnecks 14 In
+0.5
Games Above .500
Chance Will Make Playoffs