How are these numbers calculated?

Big Games

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

Week of 11/22100.0*Libertadores100.0*Average seed
Internacional 2 Atletico-MG 1 -29.1
-0.8
Corinthians 1 Gremio 0 -1.9
+0.0
Santos 0 Sao Paulo 1 -0.5
Sport Recife 2 Fluminense 2 +0.2
+0.0
Week of 11/29100.0*Libertadores100.0*Average seed
Atletico-MG 1 Coritiba 2 No
-0.5
Internacional 3 Palmeiras 1 -9.4
-0.1
Fluminense 5 Corinthians 2 +4.5
Bahia 1 Gremio 0 +0.2
Week of 12/6100.0*Libertadores100.0*Average seed
Cruzeiro 2 Fluminense 1 +0.3
Botafogo 0 Atletico-MG 0 -0.3
Gremio 1 Flamengo 1 +0.1
Points
Chance Will Win Championship