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 In
+0.4
Week of 4/11100.0*Chance in playoffs100.0*Average seed
Jackson County 2 North Oconee Hi 3 +0.4
Week of 4/21100.0*Chance in playoffs100.0*Average seed
East Jackson Co 0 Jackson County 2 +0.6
Oconee County H 2 Jackson County 3 +0.6
North Oconee Hi 0 Oconee County H 1 -0.4
Points
Chance Will Make Playoffs