How are these numbers calculated?

Big Games

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

Week of 4/25100.0*Promoted100.0*Average seed
Scunthorpe 3 Cheltenham 0 +3.6
+0.2
Tranmere 1 Yeovil 1 -1.2
-0.0
Week of 5/2100.0*Promoted100.0*Average seed
Scunthorpe 1 Tranmere 1 +9.3
+0.4
Points
Chance Will Win Championship