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*Chance wins title100.0*Average seed
Flamengo 2 Gremio 0 +4.4
+0.4
Palmeiras 4 America-MG 0 -2.9
-0.0
Parana 1 Palmeiras 1 +0.8
Sport Recife 0 Flamengo 1 +0.7
+0.3
Internacional 1 Atletico-MG 2 +0.2
+0.2
Botafogo 1 Internacional 0 +0.2
+0.2
Sao Paulo 1 Cruzeiro 0 -0.1
Gremio 2 Chapecoense 0 -0.1
Week of 11/25100.0*Chance wins title100.0*Average seed
Cruzeiro 0 Flamengo 2 +3.1
+0.1
Vasco da Gama 0 Palmeiras 1 No
-0.0
Internacional 2 Fluminense 0 -0.1
Week of 12/1None
Points
Chance Will Win Championship