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*European Competition100.0*Average seed
Feyenoord 1 Vitesse 4 +11.4
-0.1
AZ Alkmaar 3 NAC Breda 2 +3.7
+0.2
Week of 5/17100.0*European Competition100.0*Average seed
Excelsior 1 AZ Alkmaar 4 +28.5
+0.7
PEC Zwolle 3 Feyenoord 0 +14.0
+0.3
Vitesse 3 FC Utrecht 3 +4.4
+0.4
Points
Chance Will Win Championship