How are these numbers calculated?

Big Games

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

Week of 2/12100.0*Average seed
Bishop Ireton 3 Bishop O'Connell 8 -0.1
Week of 2/16100.0*Average seed
Oakton 10 Woodgrove / Clarke 0 -0.2
Games Above .500
Chance Will Make Playoffs