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 No
-0.1
Pinckney 19 Hartland 11 -0.1
Brighton 24 South Lyon East 6 -0.4
Milford 2 Pinckney 28 -0.0
Milford 5 Brighton 25 -0.0
South Lyon 12.5 Hartland 17.5 +0.0
Week of 2/4100.0*Chance wins title100.0*Average seed
South Lyon East 6 Brighton 24 -0.2
Hartland 10 South Lyon 20 -0.2
Hartland 27 South Lyon East 3 -0.2
Pinckney 24 Milford 6 -0.0
Howell 28 South Lyon 2 +0.0
Week of 2/10100.0*Chance wins title100.0*Average seed
South Lyon East 2 Pinckney 28 -0.1
Pinckney 17 Brighton 13 -0.1
South Lyon 23 Milford 7 -0.1
Games Above .500
Chance Will Win Championship