How are these numbers calculated?

Big Games

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

Week of 11/26100.0*Average seed
America-MG 2 Sport Recife 2 +0.1
Week of 12/11100.0*Average seed
Sao Paulo 5 Santa Cruz 0 -0.1
Santos 1 America-MG 0 +0.0
Points
Chance Will Win Championship