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 +8.4
+0.1
Rock 15 Black Wolves 12 +1.5
+0.1
Week of 4/25100.0*Chance in playoffs100.0*Average seed
Swarm 12 Rush 16 Out
-0.3
Bandits 17 Stealth 9 +3.0
+0.1
Knighthawks 14 Black Wolves 6 +0.1
+0.1
Black Wolves 9 Bandits 20 +0.2
Week of 5/1100.0*Chance in playoffs100.0*Average seed
Swarm 13 Knighthawks 12 +0.3
Stealth 13 Roughnecks 14 +0.2
Black Wolves 7 Rock 10 +0.1
Games Above .500
Chance Will Make Playoffs