How are these numbers calculated?

Big Games

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

Week of 11/17100.0*Libertadores100.0*Average seed
Internacional 1 Atletico-MG 2 +19.8
+0.3
Atletico-MG 1 Bahia 0 +18.5
+0.5
Atletico-PR 1 Corinthians 0 -11.3
-0.1
Vitoria 1 Atletico-PR 2 -5.6
-0.1
Sao Paulo 1 Cruzeiro 0 +5.1
+0.1
Cruzeiro 3 Vitoria 0 -3.3
-0.1
America-MG 2 Santos 1 +1.6
+0.1
Santos 1 Botafogo 1 +1.0
Botafogo 1 Internacional 0 -0.4
Week of 11/25100.0*Libertadores100.0*Average seed
Atletico-PR 2 Ceara 2 +14.2
+0.2
Cruzeiro 0 Flamengo 2 +3.5
+0.1
Week of 12/1100.0*Libertadores100.0*Average seed
Flamengo 1 Atletico-PR 2 -42.6
-0.4
Atletico-MG 1 Botafogo 0 Yes
+0.1
Points
Chance Will Win Championship