How are these numbers calculated?

Big Games

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

Week of 4/4100.0*Chance in playoffs100.0*Average seed
Winder Barrow H 0 Clarke Central 4 In
+0.1
Winder Barrow H 2 Apalachee High 3 -0.4
+0.1
Week of 4/12100.0*Chance in playoffs100.0*Average seed
Clarke Central 3 Cedar Shoals Hi 0 +0.0
Clarke Central 8 Salem High Scho 1 +0.0
Week of 4/18100.0*Chance in playoffs100.0*Average seed
Gainesville Hig 0 Clarke Central 2 +0.7
Points
Chance Will Make Playoffs