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*Libertadores100.0*Average seed
Cruzeiro 3 Vasco da Gama 1 +7.2
Yes
+0.4
Vitoria 1 Corinthians 1 +2.9
+0.0
Sao Paulo 1 Fluminense 4 -2.6
-0.2
Botafogo 1 Internacional 2 +0.8
+0.1
Goias 1 Santos 4 -0.4
Week of 11/28100.0*Chance wins title100.0*Libertadores100.0*Average seed
Flamengo 1 Cruzeiro 2 +13.6
+0.4
Palmeiras 1 Fluminense 2 -7.6
-0.2
Corinthians 2 Vasco da Gama 0 -7.5
-0.2
Week of 12/5100.0*Chance wins title100.0*Libertadores100.0*Average seed
Goias 1 Corinthians 1 +11.7
+0.2
Cruzeiro 2 Palmeiras 1 +11.7
+0.5
Fluminense 1 Guarani 0 No
-0.2
Points
Chance Will Win Championship