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 +0.5
+27.5
+0.7
Vasco da Gama 1 Sao Paulo 2 No
Vitoria 4 Gremio 2 +0.3
+0.4
+0.1
Palmeiras 2 Ipatinga 0 -10.4
-0.1
Week of 11/30100.0*Chance wins title100.0*Promoted100.0*Average seed
Internacional 1 Cruzeiro 0 -17.3
-0.6
Flamengo 3 Goias 3 +5.0
+0.1
Vitoria 0 Palmeiras 0 +1.9
+0.1
Ipatinga 1 Gremio 4 -0.7
-0.2
Week of 12/7100.0*Chance wins title100.0*Promoted100.0*Average seed
Atletico-PR 5 Flamengo 3 Yes
+0.3
Cruzeiro 4 Portuguesa 1 Yes
+0.5
Palmeiras 0 Botafogo 1 +9.8
+0.4
Points
Chance Will Win Championship