How are these numbers calculated?

Big Games

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

Week of 5/7100.0*UEFA CL100.0*Average seed
West Ham 3 Manchester United 2 +11.6
+0.1
Manchester City 2 Arsenal 2 -11.3
-0.4
West Ham 1 Swansea City 4 +8.2
+0.1
Norwich City 0 Manchester United 1 -7.2
-0.1
Week of 5/15100.0*UEFA CL100.0*Average seed
Swansea City 1 Manchester City 1 +15.0
+0.1
Manchester United 3 Bournemouth 1 -9.4
-0.1
Stoke City 2 West Ham 1 +0.4
Arsenal 4 Aston Villa 0 -0.0
Points
Chance Will Win Championship