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*Serie B**100.0*Average seed
Sport 2 Botafogo 0 +0.1
Sao Paulo 2 Nautico 1 -0.6
Portuguesa 2 Gremio 2 +0.0
Bahia 1 Ponte Preta 0 +0.1
Fluminense 0 Cruzeiro 2 -0.3
Flamengo 1 Palmeiras 1 +0.1
Week of 11/25100.0*Serie B**100.0*Average seed
Inter 0 Portuguesa 2 +0.9
-0.1
Bahia 1 Nautico 1 No
+0.3
Sport 1 Fluminense 1 No
+0.0
Cruzeiro 2 Coritiba 1 +0.1
Ponte Preta 0 Sao Paulo 0 +0.1
Week of 12/1100.0*Serie B**100.0*Average seed
Nautico 1 Sport 0 +0.7
Coritiba 3 Figueirense 0 -0.2
Flamengo 2 Botafogo 2 -0.1
Atletico-GO 0 Bahia 1 -0.1
Portuguesa 0 Ponte Preta 0 +0.1
Points
Chance Will Win Championship