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 No
+0.1
Vila Nova 1 Oeste 1 -2.5
-0.3
Brasil de Pelotas 2 Atletico-GO 2 -0.1
Sport Recife 2 Ponte Preta 1 +0.0
Week of 11/24None
Week of 11/29100.0*Serie C100.0*Average seed
Figueirense 1 Operario-PR 1 +0.3
Oeste 1 Criciuma 2 -0.1
Points
Chance Will Win Championship