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
Fluminense 3 Avai 1 +18.0
-0.5
Coritiba 1 Santos 0 +14.5
-0.3
Joinville 1 Vasco da Gama 2 +4.0
-0.1
Figueirense 0 Chapecoense 0 -0.8
+0.1
Week of 11/28100.0*Serie B100.0*Average seed
Avai 1 Ponte Preta 0 -37.1
+1.0
Palmeiras 0 Coritiba 2 +12.8
-0.4
Vasco da Gama 1 Santos 0 +9.3
-0.2
Chapecoense 1 Goias 3 +6.1
-0.1
Sao Paulo 3 Figueirense 2 -5.4
+0.1
Week of 12/6100.0*Serie B100.0*Average seed
Figueirense 1 Fluminense 0 +29.4
-0.6
Coritiba 0 Vasco da Gama 0 -15.3
+0.4
Goias 0 Sao Paulo 1 -6.9
+0.2
Corinthians 1 Avai 1 +1.8
-0.0
Points
Chance Will Win Championship