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
Coritiba 1 Santos 0 -28.6
+0.8
Fluminense 3 Avai 1 -7.9
+0.1
Joinville 1 Vasco da Gama 2 +1.7
-0.1
Figueirense 0 Chapecoense 0 -1.3
+0.0
Atletico-MG 2 Goias 2 -0.5
Week of 11/28100.0*Serie B100.0*Average seed
Palmeiras 0 Coritiba 2 -25.2
+0.7
Avai 1 Ponte Preta 0 +11.9
-0.3
Vasco da Gama 1 Santos 0 +5.3
-0.1
Sao Paulo 3 Figueirense 2 -3.5
+0.2
Chapecoense 1 Goias 3 +1.9
-0.1
Week of 12/6100.0*Serie B100.0*Average seed
Figueirense 1 Fluminense 0 +4.7
-0.1
Coritiba 0 Vasco da Gama 0 No
+0.1
Corinthians 1 Avai 1 -1.3
+0.1
Points
Chance Will Win Championship