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 1 Howell 29 -3.5
-0.2
Pinckney 3 Hartland 27 -0.4
-0.0
Brighton 28 South Lyon East 2 -0.3
Milford 13 Brighton 17 -0.0
Week of 2/4100.0*Chance wins title100.0*Average seed
South Lyon East 17 Brighton 13 +0.4
Hartland 22 South Lyon 8 No
Hartland 21 South Lyon East 9 -0.1
Pinckney 27 Milford 3 -0.0
Week of 2/10100.0*Chance wins title100.0*Average seed
South Lyon East 27 Pinckney 3 +0.5
Pinckney 24 Brighton 6 +0.1
Brighton 13 Howell 17 +0.1
Games Above .500
Chance Will Win Championship