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
Coritiba 0 Vitoria 1 -1.0
America-MG 2 Sport Recife 2 +0.1
Botafogo 1 Ponte Preta 1 +0.0
Week of 12/4100.0*Average seed
Ponte Preta 2 Coritiba 0 -0.5
Sport Recife 2 Figueirense 0 -0.4
Vitoria 1 Palmeiras 2 +0.2
Cruzeiro 3 Corinthians 2 -0.1
Points
Chance Will Win Championship