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
Sport Recife 0 Fluminense 3 -23.4
+0.7
Botafogo 3 Sao Paulo 2 +15.5
-0.2
Corinthians 2 Nautico 3 +1.5
-0.1
Santo Andre 4 Avai 2 +1.3
-0.1
Santos 4 Coritiba 0 -0.5
Atletico-PR 1 Cruzeiro 1 +0.4
Vitoria 2 Barueri 1 +0.4
-0.1
Week of 11/29100.0*Serie B100.0*Average seed
Fluminense 4 Vitoria 0 -32.9
+0.9
Cruzeiro 4 Coritiba 1 -5.8
+0.2
Atletico-PR 2 Botafogo 0 -4.9
+0.0
Santo Andre 5 Nautico 3 -0.0
Week of 12/5100.0*Serie B100.0*Average seed
Botafogo 2 Palmeiras 1 +26.3
-0.5
Coritiba 1 Fluminense 1 No
-0.0
Barueri 0 Atletico-PR 0 -0.1
Vitoria 2 Goias 2 -0.1
Points
Chance Will Win Championship