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
+1.0
Cruzeiro 1 Atletico-PR 1 -0.4
+0.1
Gremio 1 Ceara 3 +0.3
+0.0
Corinthians 2 Atletico-MG 1 -0.2
+0.2
Sao Paulo 3 America-MG 1 -0.1
Atletico-GO 0 Flamengo 0 +0.0
Week of 11/27100.0*Serie B100.0*Average seed
Palmeiras 1 Sao Paulo 0 +0.6
Gremio 2 Atletico-GO 2 +0.2
Atletico-MG 4 Botafogo 0 -0.1
Santos 1 Bahia 1 +0.0
Week of 12/4100.0*Serie B100.0*Average seed
Internacional 1 Gremio 0 +0.3
Corinthians 0 Palmeiras 0 -0.0
Points
Chance Will Win Championship