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*Serie B100.0*Average seed
Bahia 0 Palmeiras 2 No
+1.1
Cruzeiro 1 Atletico-PR 1 -0.5
+0.1
Gremio 1 Ceara 3 +0.3
Corinthians 2 Atletico-MG 1 -0.2
+0.1
Sao Paulo 3 America-MG 1 -0.1
Week of 11/27100.0*Serie B100.0*Average seed
Palmeiras 1 Sao Paulo 0 +0.7
Atletico-MG 4 Botafogo 0 -0.2
Gremio 2 Atletico-GO 2 +0.2
Santos 1 Bahia 1 +0.0
Week of 12/4100.0*Serie B100.0*Average seed
Internacional 1 Gremio 0 +0.4
Corinthians 0 Palmeiras 0 +0.1
Points
Chance Will Win Championship