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
Joinville 1 Vasco da Gama 2 -9.3
+0.7
Coritiba 1 Santos 0 +3.1
-0.1
Fluminense 3 Avai 1 -2.5
+0.1
Figueirense 0 Chapecoense 0 +0.2
Atletico-MG 2 Goias 2 -0.1
-0.0
Week of 11/28100.0*Serie B100.0*Average seed
Vasco da Gama 1 Santos 0 -19.8
+0.8
Avai 1 Ponte Preta 0 +4.9
-0.3
Palmeiras 0 Coritiba 2 +4.1
-0.1
Sao Paulo 3 Figueirense 2 -2.7
+0.1
Chapecoense 1 Goias 3 +0.4
-0.3
Week of 12/6100.0*Serie B100.0*Average seed
Coritiba 0 Vasco da Gama 0 Yes
-0.4
Figueirense 1 Fluminense 0 +16.1
-0.3
Corinthians 1 Avai 1 -3.1
+0.1
Goias 0 Sao Paulo 1 +0.2
Points
Chance Will Win Championship