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 +7.5
-0.2
Fluminense 3 Avai 1 -5.1
+0.1
Figueirense 0 Chapecoense 0 +4.4
-0.2
Joinville 1 Vasco da Gama 2 +2.6
-0.1
Atletico-MG 2 Goias 2 -1.6
+0.0
Week of 11/28100.0*Serie B100.0*Average seed
Sao Paulo 3 Figueirense 2 +21.3
-0.5
Avai 1 Ponte Preta 0 +13.1
-0.2
Palmeiras 0 Coritiba 2 +9.6
-0.2
Vasco da Gama 1 Santos 0 +4.3
-0.2
Chapecoense 1 Goias 3 +1.4
-0.1
Week of 12/6100.0*Serie B100.0*Average seed
Figueirense 1 Fluminense 0 -46.5
+1.2
Corinthians 1 Avai 1 -9.5
+0.1
Coritiba 0 Vasco da Gama 0 +4.9
-0.2
Goias 0 Sao Paulo 1 +0.2
Points
Chance Will Win Championship