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 +0.2
Botafogo 1 Ponte Preta 1 +0.1
Week of 12/11100.0*Average seed
Fluminense 1 Internacional 1 -0.5
Cruzeiro 3 Corinthians 2 -0.3
Sao Paulo 5 Santa Cruz 0 -0.3
Ponte Preta 2 Coritiba 0 -0.2
Chapecoense 0 Atletico-MG 0 -0.1
Points
Chance Will Win Championship