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
North Oconee Hi 6 Elbert County H 0 +1.1
+0.0
Week of 4/11100.0*Chance in playoffs100.0*Average seed
Jackson County 2 North Oconee Hi 3 +0.0
Week of 4/21100.0*Chance in playoffs100.0*Average seed
East Jackson Co 0 Jackson County 2 -0.1
Oconee County H 2 Jackson County 3 -0.1
Points
Chance Will Make Playoffs