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 +21.8
+0.7
Stealth 9 Knighthawks 13 +2.6
+0.1
Rock 15 Black Wolves 12 +1.5
+0.1
Week of 4/25100.0*Chance in playoffs100.0*Average seed
Knighthawks 14 Black Wolves 6 +1.7
+0.1
Swarm 12 Rush 16 +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