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
Palmeiras 4 America-MG 0 +9.6
+0.1
Flamengo 2 Gremio 0 -7.9
-0.1
Botafogo 1 Internacional 0 +5.5
+0.1
Sport Recife 0 Flamengo 1 -2.8
Internacional 1 Atletico-MG 2 +2.8
+0.0
Parana 1 Palmeiras 1 -1.4
-0.0
Gremio 2 Chapecoense 0 -0.1
Week of 11/25100.0*Chance wins title100.0*Average seed
Cruzeiro 0 Flamengo 2 -7.7
-0.1
Vasco da Gama 0 Palmeiras 1 Yes
Week of 12/1None
Points
Chance Will Win Championship