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 +22.3
-0.4
Atletico-MG 4 Goias 1 -17.7
+0.2
Parana 2 Santos 3 -5.8
+0.1
Figueirense 2 Nautico 0 -0.4
+0.1
Fluminense 3 Juventude 2 -0.4
+0.0
Week of 12/2100.0*Serie B100.0*Average seed
Goias 2 Internacional 1 +27.1
-0.4
Vasco da Gama 3 Parana 0 -11.7
+0.2
Gremio 1 Corinthians 1 +5.5
-0.0
Points
Chance Will Win Championship