How are these numbers calculated?

Big Games

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

Week of 1/27100.0*Chance wins title100.0*Average seed
South Lyon East 11.5 Howell 18.5 -0.2
+0.1
South Lyon 12.5 Hartland 17.5 No
-0.5
Week of 2/4100.0*Chance wins title100.0*Average seed
Hartland 10 South Lyon 20 +0.3
Howell 28 South Lyon 2 -0.3
South Lyon East 6 Brighton 24 +0.1
Hartland 27 South Lyon East 3 +0.1
Week of 2/10100.0*Chance wins title100.0*Average seed
South Lyon 23 Milford 7 +0.2
Brighton 14 Hartland 16 +0.1
Pinckney 23 South Lyon 7 -0.1
South Lyon East 2 Pinckney 28 +0.1
Games Above .500
Chance Will Win Championship