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
Atletico-PR 5 Sao Caetano 2 +22.3
+0.4
Santos 5 Gremio 1 -9.9
-0.1
Vitoria 1 Sao Paulo 4 -2.6
-0.1
Goias 0 Palmeiras 0 Yes
Week of 12/11100.0*Chance wins title100.0*Libertadores100.0*Average seed
Vasco da Gama 1 Atletico-PR 0 -22.7
-0.3
Sao Caetano 0 Santos 3 -20.7
-0.2
Sao Paulo 1 Flamengo 1 +1.7
+0.0
Week of 12/19100.0*Chance wins title100.0*Libertadores100.0*Average seed
Atletico-PR 1 Botafogo 1 No
-0.2
Santos 2 Vasco da Gama 1 No
-0.3
Goias 2 Sao Paulo 0 +0.1
Points
Chance Will Win Championship