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
Botafogo 1 Internacional 2 No
-19.9
-0.8
Sao Paulo 1 Fluminense 4 No
+0.2
+0.0
Cruzeiro 3 Vasco da Gama 1 -0.5
-0.1
Goias 1 Santos 4 -0.9
-0.1
Week of 11/28100.0*Chance wins title100.0*Libertadores100.0*Average seed
Botafogo 3 Gremio Prudente 1 +14.4
+0.8
Guarani 0 Gremio 3 -5.1
-0.2
Ceara 1 Atletico-PR 1 +3.6
+0.1
Avai 3 Santos 2 +1.5
+0.3
Internacional 1 Vitoria 1 +1.4
+0.1
Atletico-GO 1 Sao Paulo 1 +0.0
Week of 12/5100.0*Chance wins title100.0*Libertadores100.0*Average seed
Gremio 3 Botafogo 0 No
-0.5
Atletico-PR 1 Avai 0 -0.4
Points
Chance Will Win Championship