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
Swarm 21 Bandits 7 +13.5
+0.7
Wings 15 Swarm 13 -2.1
-1.0
Rush 7 Mammoth 9 +0.8
-0.1
Knighthawks 14 Wings 7 +0.3
Roughnecks 11 Stealth 12 -0.1
-0.2
Rock 10 Knighthawks 9 -0.1
+0.1
Week of 4/13100.0*Chance in playoffs100.0*Average seed
Stealth 10 Bandits 15 -5.7
Rush 14 Knighthawks 10 -4.6
+0.1
Mammoth 12 Swarm 17 +1.9
+0.8
Wings 10 Rock 9 -1.4
-0.2
Roughnecks 14 Knighthawks 15 -0.7
-0.2
Week of 4/20100.0*Chance in playoffs100.0*Average seed
Swarm 14 Mammoth 16 -15.1
-1.8
Bandits 9 Knighthawks 10 In
-0.0
Stealth 17 Wings 13 -7.5
-0.2
Rush 11 Roughnecks 12 +0.3
Games Above .500
Chance Will Make Playoffs