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 +0.1
Botafogo 1 Ponte Preta 1 +0.0
Week of 12/4100.0*Average seed
Fluminense 1 Internacional 1 -0.7
Cruzeiro 3 Corinthians 2 -0.3
Ponte Preta 2 Coritiba 0 -0.3
Sao Paulo 5 Santa Cruz 0 -0.2
Chapecoense 0 Atletico-MG 0 -0.2
Points
Chance Will Win Championship