How are these numbers calculated?

Big Games

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

Week of 2/5100.0*Average seed
Milford 3 Hartland 27 +0.0
Week of 2/9100.0*Average seed
South Lyon East 3 Hartland 27 -0.0
South Lyon East 9 Howell 21 -0.0
South Lyon 23 Milford 7 +0.0
Week of 2/16None
Games Above .500
Chance Will Win Championship