How are these numbers calculated?

Big Games

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

Week of 11/21100.0*Chance wins title100.0*Average seed
Sao Paulo 1 Fluminense 4 -16.2
-0.2
Cruzeiro 3 Vasco da Gama 1 -7.2
-0.1
Vitoria 1 Corinthians 1 -6.3
-0.1
Botafogo 1 Internacional 2 +0.1
Week of 11/28100.0*Chance wins title100.0*Average seed
Corinthians 2 Vasco da Gama 0 +25.8
+0.5
Palmeiras 1 Fluminense 2 -19.3
-0.2
Flamengo 1 Cruzeiro 2 -7.2
-0.3
Week of 12/5100.0*Chance wins title100.0*Average seed
Fluminense 1 Guarani 0 No
-0.3
Goias 1 Corinthians 1 -7.0
-0.1
Cruzeiro 2 Palmeiras 1 -6.2
-0.4
Points
Chance Will Win Championship