How are these numbers calculated?

Big Games

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

Week of 2/8100.0*Chance in playoffs100.0*Average seed
Northampton 3 SouthernLehigh 1 -28.1
-0.8
Easton 1 Emmaus 9 -3.2
-0.1
Week of 2/19100.0*Chance in playoffs100.0*Average seed
Easton 0 Parkland 11 Out
-0.3
Emmaus 1 SouthernLehigh 11 +25.0
+0.2
Emmaus 1 Parkland 8 -12.5
Points
Chance Will Make Playoffs