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 -2.4
-21.0
-0.7
Vasco da Gama 1 Sao Paulo 2 -1.6
-0.0
Vitoria 4 Gremio 2 +1.6
+0.6
+0.2
Palmeiras 2 Ipatinga 0 -0.1
-6.4
-0.2
Week of 11/30100.0*Chance wins title100.0*Promoted100.0*Average seed
Flamengo 3 Goias 3 -15.4
-0.3
Internacional 1 Cruzeiro 0 +9.4
+0.2
Vitoria 0 Palmeiras 0 +8.4
+0.2
Ipatinga 1 Gremio 4 -2.9
-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 -16.7
-0.3
Palmeiras 0 Botafogo 1 +10.9
+0.2
Points
Chance Will Win Championship