How are these numbers calculated?

Big Games

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

Week of 11/4100.0*Campeonato Nacional de Rugby - Segunda100.0*Average seed
CCP 24 UBR 24 -8.7
+0.2
LeÃ;µes 28 XVmarÃ;§o 12 -0.1
+0.0
Week of 11/11100.0*Campeonato Nacional de Rugby - Segunda100.0*Average seed
UBR 34 Ferroviarios 56 +22.1
-0.5
Destecheu 14 Fortaleza 56 -11.6
+0.1
Riolagen 21 LeÃ;µes 14 +11.1
-0.2
XVmarÃ;§o 21 Werklagger 28 -2.9
+0.1
Week of 11/18100.0*Campeonato Nacional de Rugby - Segunda100.0*Average seed
Fortaleza 56 UBR 42 +26.9
-0.4
Riolagen 0 XVmarÃ;§o 34 -9.9
+0.1
LeÃ;µes 38 Destecheu 21 -2.1
+0.1
Points
Chance Will Win Championship