How are these numbers calculated?

Big Games

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

Week of 11/21100.0*Serie B100.0*Average seed
Botafogo 3 Sao Paulo 2 +4.6
-0.1
Corinthians 2 Nautico 3 -4.5
+0.5
Sport Recife 0 Fluminense 3 +2.9
-0.2
Santos 4 Coritiba 0 -0.3
Santo Andre 4 Avai 2 +0.2
-0.2
Vitoria 2 Barueri 1 +0.1
Atletico-PR 1 Cruzeiro 1 +0.1
Week of 11/29100.0*Serie B100.0*Average seed
Santo Andre 5 Nautico 3 Yes
-0.5
Fluminense 4 Vitoria 0 +1.1
-0.1
Atletico-PR 2 Botafogo 0 -1.0
Cruzeiro 4 Coritiba 1 -0.3
Week of 12/5100.0*Serie B100.0*Average seed
Nautico 0 Avai 1 -0.0
Points
Chance Will Win Championship