How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Serie B100.0*Average seed
Fluminense 2 Ponte Preta 0 +19.9
-0.8
Sport Recife 1 Bahia 0 +3.3
-0.2
Atletico-MG 3 Coritiba 0 -1.5
+0.1
Vitoria 1 Cruzeiro 1 -1.4
+0.0
Avai 2 Palmeiras 1 +1.4
-0.1
Atletico-GO 1 Chapecoense 1 -0.1
Sao Paulo 0 Botafogo 0 +0.1
Atletico-PR 3 Vasco da Gama 1 +0.1
Week of 11/25100.0*Serie B100.0*Average seed
Fluminense 1 Sport Recife 2 +5.9
-0.2
Week of 12/3100.0*Serie B100.0*Average seed
Vasco da Gama 2 Ponte Preta 1 -0.3
Santos 1 Avai 1 -0.1
Sport Recife 1 Corinthians 0 -0.1
Points
Chance Will Win Championship