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*Average seed
Chapecoense 1 Ponte Preta 0 -18.8
-0.2
Vitoria 0 Chapecoense 0 +13.3
+0.1
America-MG 1 Botafogo-SP 1 -12.9
-0.1
Brasil de Pelotas 0 America-MG 0 -12.0
-0.1
Week of 1/22100.0*Chance wins title100.0*Average seed
Operario-PR 2 Chapecoense 0 +25.4
+0.3
Confianca 0 America-MG 0 -12.6
-0.1
Week of 1/29100.0*Chance wins title100.0*Average seed
America-MG 2 Avai 1 +26.6
+0.3
Chapecoense 3 Confianca 1 -22.6
-0.2
Points
Chance Will Win Championship