How are these numbers calculated?

Big Games

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

Week of 11/26100.0*Libertadores100.0*Average seed
Corinthians 0 Atletico-PR 0 +4.1
+0.1
Botafogo 1 Ponte Preta 1 +0.5
+0.0
Week of 12/11100.0*Libertadores100.0*Average seed
Cruzeiro 3 Corinthians 2 Yes
+0.2
Gremio 0 Botafogo 1 -11.1
-0.3
Atletico-PR 0 Flamengo 0 -2.0
-0.2
Points
Chance Will Win Championship