How are these numbers calculated?

Big Games

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

Week of 3/22100.0*Chance in playoffs100.0*Average seed
Orono 3 Ventura 2 -28.1
-0.3
Week of 3/26100.0*Chance in playoffs100.0*Average seed
Ventura 2 Orono 1 +25.3
+0.7
Liberty 3 Firefighters 4 +0.3
-0.2
Week of 4/3100.0*Chance in playoffs100.0*Average seed
Ventura 1 Liberty 2 Out
-0.8
Firefighters 2 Orono 1 +5.4
+0.1
Games Above .500
Chance Will Make Playoffs