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
Corinthians 0 Vasco da Gama 1 +23.7
-0.5
Atletico-MG 4 Goias 1 -18.6
+0.2
Parana 2 Santos 3 -7.4
+0.2
Figueirense 2 Nautico 0 -0.6
+0.1
Fluminense 3 Juventude 2 -0.4
+0.0
Week of 12/2100.0*Serie B100.0*Average seed
Goias 2 Internacional 1 +19.8
-0.3
Gremio 1 Corinthians 1 +14.8
-0.2
Vasco da Gama 3 Parana 0 -11.1
+0.2
Points
Chance Will Win Championship