How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Chance wins title100.0*Promoted100.0*Average seed
Cruzeiro 3 Flamengo 2 -4.1
-19.5
-0.7
Vasco da Gama 1 Sao Paulo 2 -3.5
-0.1
Vitoria 4 Gremio 2 +1.6
+0.5
+0.1
Palmeiras 2 Ipatinga 0 -0.2
-8.8
-0.2
Week of 11/30100.0*Chance wins title100.0*Promoted100.0*Average seed
Flamengo 3 Goias 3 -12.8
-0.3
Internacional 1 Cruzeiro 0 +7.6
+0.2
Vitoria 0 Palmeiras 0 +4.4
+0.1
Ipatinga 1 Gremio 4 -3.7
-0.1
Week of 12/7100.0*Chance wins title100.0*Promoted100.0*Average seed
Atletico-PR 5 Flamengo 3 No
-0.6
Cruzeiro 4 Portuguesa 1 -18.4
-0.3
Palmeiras 0 Botafogo 1 +4.7
+0.1
Points
Chance Will Win Championship