How are these numbers calculated?

Big Games

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

Week of 11/24100.0*Serie B100.0*Average seed
Parana 2 Santos 3 +9.7
-0.3
Corinthians 0 Vasco da Gama 1 -4.0
+0.1
Atletico-MG 4 Goias 1 -3.6
+0.1
Fluminense 3 Juventude 2 -0.2
+0.1
Week of 12/2100.0*Serie B100.0*Average seed
Goias 2 Internacional 1 Yes
-0.2
Vasco da Gama 3 Parana 0 Yes
-0.5
Gremio 1 Corinthians 1 -6.0
+0.1
Juventude 2 Sport Recife 1 -0.2
Points
Chance Will Win Championship