How are these numbers calculated?

Big Games

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

Week of 11/22100.0*Serie B100.0*Average seed
Chapecoense 2 Botafogo 0 +4.7
-0.4
Figueirense 2 Vitoria 0 -1.2
+0.0
Bahia 1 Atletico-PR 2 -0.4
+0.1
Coritiba 2 Palmeiras 0 +0.2
Flamengo 1 Criciuma 1 +0.0
Week of 11/29100.0*Serie B100.0*Average seed
Santos 2 Botafogo 0 Yes
-0.3
Internacional 3 Palmeiras 1 -0.5
Bahia 1 Gremio 0 +0.5
-0.3
Flamengo 4 Vitoria 0 -0.3
Criciuma 2 Sport Recife 2 +0.1
Week of 12/6100.0*Serie B100.0*Average seed
Corinthians 2 Criciuma 1 +0.1
Points
Chance Will Win Championship