How are these numbers calculated?

Big Games

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

Week of 11/29100.0*Serie B100.0*Average seed
Fortaleza 5 Parana 3 -21.6
+1.0
Criciuma 0 Gremio 2 +8.0
-0.2
Corinthians 1 Bahia 2 +8.0
-0.2
Ponte Preta 1 Sao Paulo 2 -3.8
+0.1
Fluminense 2 Sao Caetano 1 +3.7
-0.2
Juventude 1 Atletico-MG 0 +2.4
-0.2
Cruzeiro 2 Paysandu 1 -0.6
+0.1
Vasco da Gama 1 Figueirense 0 +0.1
-0.1
Week of 12/6100.0*Serie B100.0*Average seed
Criciuma 3 Bahia 2 -3.8
+0.2
Santos 2 Gremio 2 -2.4
+0.1
Cruzeiro 5 Fluminense 2 -2.1
+0.2
Guarani 2 Paysandu 1 -2.1
+0.2
Fortaleza 2 Coritiba 2 -0.9
-0.3
Juventude 2 Sao Caetano 1 +0.3
-0.2
Flamengo 1 Ponte Preta 1 -0.2
+0.0
Week of 12/13100.0*Serie B100.0*Average seed
Ponte Preta 2 Fortaleza 0 +19.3
-1.6
Gremio 3 Corinthians 0 +9.9
-0.4
Bahia 0 Cruzeiro 7 -5.6
+0.1
Paysandu 2 Atletico-PR 2 +4.4
-0.0
Fluminense 1 Juventude 0 +4.4
-0.3
Points
Chance Will Win Championship