How are these numbers calculated?

Big Games

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

Week of 4/30100.0*UEFA100.0*Average seed
Belenenses 0 Paços Ferreira 2 +23.6
+0.5
Tondela 1 Rio Ave 1 +5.8
+0.1
Estoril Praia 2 Marítimo 1 -2.3
-0.1
Arouca 3 Nacional 0 -1.7
-0.1
Week of 5/6100.0*UEFA100.0*Average seed
Paços Ferreira 1 Tondela 4 -36.9
-0.6
Estoril Praia 1 Arouca 1 +10.1
+0.2
Week of 5/14100.0*UEFA100.0*Average seed
U. Madeira 1 Rio Ave 2 -18.1
-0.3
V. Setúbal 0 Paços Ferreira 0 -17.0
-0.2
Belenenses 2 Estoril Praia 1 +10.5
+0.3
Points
Chance Will Win Championship