How are these numbers calculated?

Big Games

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

Week of 11/20100.0*Serie C100.0*Average seed
Sao Bento 4 Londrina 1 -0.5
-0.2
Vila Nova 1 Oeste 1 -0.2
+0.1
Week of 11/24None
Week of 11/29100.0*Serie C100.0*Average seed
Oeste 1 Criciuma 2 +0.9
Londrina 2 Guarani 0 -0.6
America-MG 1 Sao Bento 2 -0.6
Points
Chance Will Win Championship