How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Chance wins title100.0*Championship100.0*Average seed
Stevenage 0 Yeovil 2 +3.9
+10.1
+0.8
Oldham 1 Yeovil 0 No
-6.2
-0.5
Crewe 1 Doncaster 2 -1.7
-1.8
-0.1
Shrewsbury 0 Bournemouth 3 -0.8
-2.7
-0.1
Brentford 3 Portsmouth 2 -0.5
-1.0
-0.1
Sheff Utd 2 Swindon 0 -0.3
-0.8
-0.0
Sheff Utd 2 Brentford 2 +0.4
Swindon 4 Crewe 1 -0.0
Tranmere 0 Hartlepool 1 +0.4
Scunthorpe 1 Walsall 1 +0.2
Leyton Orient 2 MK Dons 0 +0.2
Week of 4/20100.0*Chance wins title100.0*Championship100.0*Average seed
Bournemouth 3 Carlisle 1 -0.6
-0.0
Hartlepool 1 Brentford 1 +0.5
+0.0
Yeovil 1 Crewe 0 +0.4
+0.3
Portsmouth 3 Sheff Utd 0 +0.2
+0.2
Crewe 1 Sheff Utd 0 +0.2
Swindon 3 Stevenage 0 -0.1
Week of 4/27100.0*Chance wins title100.0*Championship100.0*Average seed
Bury 3 Yeovil 2 -0.9
Brentford 0 Doncaster 1 +0.2
Scunthorpe 2 Swindon 1 +0.2
Sheff Utd 0 Preston 0 +0.1
Points
Chance Will Win Championship