How are these numbers calculated?

Big Games

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

Week of 5/10100.0*Campeonato Nacional100.0*Average seed
Abedi Pelé 18 AE Popular 13 +15.3
-0.6
Paternos 25 Poti 15 -3.7
+0.1
União Militar 20 Liga Operária 18 +1.2
-0.0
Jiquiá FAC 39 Serafiano 10 -0.4
+0.1
Week of 5/17100.0*Campeonato Nacional100.0*Average seed
Poti 30 Olímpia 28 +21.2
-0.4
Liga Operária 43 Siliar 37 +18.8
-0.4
AE Popular 10 Paternos 22 +12.8
-0.4
Serafiano 30 FAC Metropolitano 27 (ot)+1.1
-0.2
União Militar 28 Jiquiá FAC 39 -0.3
+0.1
Week of 5/24100.0*Campeonato Nacional100.0*Average seed
AE Popular 40 Olímpia 37 -66.1
+1.7
Poti 42 Dima Cardinals 42 (ot)+6.8
-0.2
Liga Operária 23 Abedi Pelé 18 +5.1
-0.2
FAC Metropolitano 27 União Militar 13 -2.0
+0.0
Points
Chance Will Win Championship