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 B100.0*Average seed
Sport 2 Botafogo 0 +10.4
-0.2
Bahia 1 Ponte Preta 0 +4.2
-0.2
Flamengo 1 Palmeiras 1 -0.5
Portuguesa 2 Gremio 2 +0.3
-0.1
Week of 11/25100.0*Serie B100.0*Average seed
Inter 0 Portuguesa 2 -26.4
+0.7
Sport 1 Fluminense 1 -1.7
+0.0
Bahia 1 Nautico 1 -0.8
+0.1
Ponte Preta 0 Sao Paulo 0 -0.0
Week of 12/1100.0*Serie B100.0*Average seed
Nautico 1 Sport 0 No
Portuguesa 0 Ponte Preta 0 No
-0.3
Atletico-GO 0 Bahia 1 +4.5
-0.3
Coritiba 3 Figueirense 0 -0.2
Points
Chance Will Win Championship