How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Série A100.0*Average seed
Guaratinguetá 0 Ceará 1 -7.0
-0.2
Icasa 2 Paysandu 1 -3.7
-0.1
Week of 11/22100.0*Série A100.0*Average seed
Boa Esporte 2 Sport 3 +20.2
+0.6
Icasa 1 Chapecoense 2 +8.3
+0.2
Palmeiras 4 Ceará 1 +4.6
+0.1
Joinville 2 América-MG 1 +1.4
+0.1
Figueirense 2 ASA 0 -1.3
-0.0
Week of 11/29None
Points  (Full Screen)
Chance Will Win Championship  (Full Screen)