How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 12/4100.0*Chance wins title100.0*Libertadores100.0*Average seed
Vitoria 1 Sao Paulo 4 +5.3
Yes
+0.4
Atletico-PR 5 Sao Caetano 2 -4.4
+0.4
+0.0
Santos 5 Gremio 1 -1.7
-0.1
Goias 0 Palmeiras 0 +2.3
+0.0
Week of 12/11100.0*Chance wins title100.0*Libertadores100.0*Average seed
Vasco da Gama 1 Atletico-PR 0 +4.4
+0.1
Sao Paulo 1 Flamengo 1 -3.0
-0.2
Sao Caetano 0 Santos 3 -1.9
-0.1
Week of 12/19100.0*Chance wins title100.0*Libertadores100.0*Average seed
Atletico-PR 1 Botafogo 1 -0.1
Goias 2 Sao Paulo 0 -0.1
Points
Chance Will Win Championship