How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Promoted100.0*Average seed
Millwall 3 Carlisle 0 +0.9
Tranmere 1 Southend 0 -0.8
-0.4
Hartlepool 0 Nottm Forest 1 -0.5
-0.2
Doncaster 2 Luton 0 -0.3
-0.1
Week of 5/3100.0*Promoted100.0*Average seed
Southend 1 Port Vale 1 -0.5
Leeds 2 Gillingham 1 -0.1
Points
Chance Will Win Championship