How are these numbers calculated?

Big Games

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

Week of 3/23100.0*Chance in playoffs100.0*Average seed
SilverBullets 4 SpruceStTavern 6 In
+0.4
Icemen 2 TheHooligans 9 -0.2
Week of 3/29100.0*Chance in playoffs100.0*Average seed
SpruceStTavern 9 Eagles 3 +0.5
Week of 4/8None
Points
Chance Will Make Playoffs