How are these numbers calculated?

Big Games

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

Week of 11/18100.0*Libertadores100.0*Average seed
Sport 2 Botafogo 0 -3.5
-0.5
Sao Paulo 2 Nautico 1 -3.4
Inter 0 Corinthians 2 -0.5
-0.1
Week of 11/25100.0*Libertadores100.0*Average seed
Botafogo 2 Atletico-MG 3 -0.6
Inter 0 Portuguesa 2 +0.1
Cruzeiro 2 Coritiba 1 -0.1
Week of 12/1100.0*Libertadores100.0*Average seed
Atletico-MG 3 Cruzeiro 2 +0.4
Fluminense 1 Vasco 2 -0.4
Flamengo 2 Botafogo 2 -0.2
Points
Chance Will Win Championship