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 +9.7
+0.2
Doncaster 2 Luton 0 +7.9
+0.3
Hartlepool 0 Nottm Forest 1 -2.9
-0.2
Tranmere 1 Southend 0 +0.2
+0.1
Oldham 2 Cheltenham 1 +0.2
Week of 5/3100.0*Promoted100.0*Average seed
Cheltenham 2 Doncaster 1 -35.2
-0.8
Carlisle 1 Bournemouth 1 +3.7
+0.3
Nottm Forest 3 Yeovil 2 -2.0
-0.1
Luton 0 Huddersfield 1 +0.3
Brighton 0 Swansea City 1 +0.3
Northampton 2 Tranmere 1 +0.3
Southend 1 Port Vale 1 +0.2
Crewe 1 Oldham 4 +0.2
Leeds 2 Gillingham 1 +0.2
Walsall 2 Hartlepool 2 +0.2
Points
Chance Will Win Championship