How are these numbers calculated?

Big Games

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

Week of 11/13100.0*Chance wins title100.0*Promoted100.0*Average seed
Vasco/RJ 2 América/RN 1 No
Figueirense/SC 2 Bragantino/SP 1 -0.6
Portuguesa/SP 1 Duque de Caxias 1 +0.3
Ceará/CE 2 Guarani/SP 2 +0.2
+0.1
Ipatinga/MG 1 Atlético/GO 0 +0.1
+0.2
Week of 11/21100.0*Chance wins title100.0*Promoted100.0*Average seed
Bahia/BA 2 Guarani/SP 0 -1.1
-0.4
Figueirense/SC 1 Duque de Caxias 2 Yes
Juventude/RS 1 Atlético/GO 3 -0.2
-0.1
Ponte Preta/SP 1 Ceará/CE 2 -0.1
-0.1
Week of 11/27100.0*Chance wins title100.0*Promoted100.0*Average seed
Atlético/GO 0 Bahia/BA 3 +0.3
Guarani/SP 2 Juventude/RS 1 +0.2
Ceará/CE 0 América/RN 0 +0.2
Points
Chance Will Win Championship