How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Serie B100.0*Average seed
Santos 1 Fluminense 0 +15.6
-1.1
Vasco da Gama 2 Cruzeiro 1 +3.0
-0.1
Bahia 1 Portuguesa 0 +1.6
Internacional 0 Coritiba 0 -1.1
+0.1
Flamengo 1 Corinthians 0 +0.3
-0.1
Ponte Preta 1 Gremio 1 -0.2
Criciuma 1 Vitoria 1 +0.0
Week of 11/30100.0*Serie B100.0*Average seed
Coritiba 2 Botafogo 1 +12.5
-0.3
Fluminense 2 Atletico-MG 2 +10.3
-0.4
Vasco da Gama 2 Nautico 0 +10.3
-0.3
Criciuma 1 Sao Paulo 0 +2.7
-0.2
Ponte Preta 0 Portuguesa 2 +2.1
-0.2
Cruzeiro 1 Bahia 2 +2.1
-0.2
Corinthians 0 Internacional 0 +0.1
Week of 12/7100.0*Serie B100.0*Average seed
Bahia 1 Fluminense 2 -55.5
+1.4
Sao Paulo 0 Coritiba 1 +8.3
-0.2
Atletico-PR 5 Vasco da Gama 1 -4.7
+0.3
Points
Chance Will Win Championship