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 +11.8
Yes
+0.5
Sao Paulo 1 Fluminense 4 -4.3
+0.1
-0.2
Vitoria 1 Corinthians 1 +1.2
Botafogo 1 Internacional 2 +0.9
+0.1
Goias 1 Santos 4 -0.6
Week of 11/28100.0*Chance wins title100.0*Libertadores100.0*Average seed
Flamengo 1 Cruzeiro 2 +20.3
+0.5
Palmeiras 1 Fluminense 2 -10.2
-0.2
Corinthians 2 Vasco da Gama 0 -9.3
-0.2
Week of 12/5100.0*Chance wins title100.0*Libertadores100.0*Average seed
Cruzeiro 2 Palmeiras 1 +26.2
+0.8
Fluminense 1 Guarani 0 No
-0.2
Goias 1 Corinthians 1 +8.3
+0.1
Points
Chance Will Win Championship