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
Atletico-MG 4 Goias 1 +22.3
-0.4
Corinthians 0 Vasco da Gama 1 -17.3
+0.2
Parana 2 Santos 3 -3.4
+0.1
Figueirense 2 Nautico 0 -0.5
+0.0
Fluminense 3 Juventude 2 -0.2
+0.0
Week of 12/2100.0*Serie B100.0*Average seed
Goias 2 Internacional 1 -42.5
+0.6
Vasco da Gama 3 Parana 0 -3.7
+0.2
Gremio 1 Corinthians 1 +0.5
-0.0
Points
Chance Will Win Championship