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
Avai 2 Palmeiras 1 -5.8
+0.7
Fluminense 2 Ponte Preta 0 -0.7
+0.1
Sport Recife 1 Bahia 0 +0.3
-0.2
Atletico-MG 3 Coritiba 0 -0.1
Atletico-GO 1 Chapecoense 1 +0.0
Week of 11/25100.0*Serie B100.0*Average seed
Fluminense 1 Sport Recife 2 +2.7
-0.3
Week of 12/3100.0*Serie B100.0*Average seed
Santos 1 Avai 1 Yes
+0.0
Sport Recife 1 Corinthians 0 +8.5
-0.3
Chapecoense 2 Coritiba 1 -3.2
+0.1
Vasco da Gama 2 Ponte Preta 1 +0.1
Points
Chance Will Win Championship