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
Rush 11 Bandits 8 -11.1
-0.5
Knighthawks 14 Roughnecks 12 -2.7
-0.2
Swarm 14 Stealth 9 +1.7
Mammoth 19 Rock 12 +0.1
Week of 4/20100.0*Chance in playoffs100.0*Average seed
Stealth 13 Rock 16 +6.5
Mammoth 11 Rush 14 -1.2
Week of 4/28100.0*Chance in playoffs100.0*Average seed
Stealth 16 Bandits 17 +0.6
Knighthawks 9 Wings 7 -0.4
Games Above .500
Chance Will Make Playoffs