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 Yes
-0.4
Coritiba 1 Santos 0 +0.3
Fluminense 3 Avai 1 -0.3
Atletico-MG 2 Goias 2 -0.1
+0.0
Week of 11/28100.0*Serie B100.0*Average seed
Cruzeiro 3 Joinville 0 -0.1
Chapecoense 1 Goias 3 -0.1
Week of 12/6None
Points
Chance Will Win Championship