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
Life 25 Old Blue 21 +24.6
+0.5
Boston 22 NYAC 28 +1.2
+0.0
Week of 4/13None
Week of 4/20100.0*Chance in playoffs100.0*Average seed
NYAC 25 Life 22 -0.5
Games Above .500
Chance Will Make Playoffs