How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Chance wins title100.0*Libertadores100.0*Average seed
Vasco da Gama 2 Avai 0 No
-0.3
Botafogo 1 Internacional 2 -15.3
-1.1
Atletico-GO 0 Flamengo 0 +1.6
+0.0
Figueirense 0 Fluminense 4 +1.5
+0.1
Sao Paulo 3 America-MG 1 -1.0
-0.2
Coritiba 1 Santos 0 +0.3
+0.0
Week of 11/27100.0*Chance wins title100.0*Libertadores100.0*Average seed
Atletico-MG 4 Botafogo 0 -7.8
-1.0
Flamengo 1 Internacional 0 -1.6
-0.0
Figueirense 0 Corinthians 1 +1.5
+0.2
Palmeiras 1 Sao Paulo 0 +1.4
+0.2
Coritiba 1 Avai 0 -0.2
-0.3
Santos 1 Bahia 1 +0.1
Week of 12/4100.0*Chance wins title100.0*Libertadores100.0*Average seed
Botafogo 1 Fluminense 1 -0.8
Internacional 1 Gremio 0 -0.2
Avai 1 Figueirense 1 +0.1
Atletico-PR 1 Coritiba 0 +0.1
Sao Paulo 4 Santos 1 -0.1
Points
Chance Will Win Championship