How are these numbers calculated?

Big Games

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

Week of 11/20100.0*Serie A100.0*Average seed
Brasil de Pelotas 2 Atletico-GO 2 +6.8
+0.1
Sport Recife 2 Ponte Preta 1 -0.2
-0.0
Week of 11/24100.0*Serie A100.0*Average seed
Coritiba 1 Bragantino 0 -7.2
-0.3
Week of 11/29100.0*Serie A100.0*Average seed
America-MG 1 Sao Bento 2 -38.3
-0.7
Vitoria 1 Coritiba 2 -0.3
Points
Chance Will Win Championship