How are these numbers calculated?

Big Games

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

Week of 1/15100.0*Chance wins title100.0*Serie A100.0*Average seed
America-MG 1 Botafogo-SP 1 No
Parana 0 Cuiaba 2 +4.4
+0.2
Botafogo-SP 1 CSA 3 -2.7
-0.1
Juventude 1 Cruzeiro 0 -2.2
-0.1
Avai 5 Juventude 2 +1.9
+0.1
CSA 1 Avai 1 +0.9
+0.0
Ponte Preta 2 Nautico 0 -0.2
Week of 1/22100.0*Chance wins title100.0*Serie A100.0*Average seed
Cuiaba 1 Sampaio Correa 3 -0.8
-0.1
Juventude 2 Figueirense 1 -0.4
CSA 1 Brasil de Pelotas 1 Yes
+0.0
Week of 1/29100.0*Chance wins title100.0*Serie A100.0*Average seed
CRB 4 Cuiaba 1 -0.3
Guarani 0 Juventude 1 -0.2
Points
Chance Will Win Championship