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
Crewe 1 Doncaster 2 +23.9
+14.5
+0.6
Shrewsbury 0 Bournemouth 3 -9.5
-6.4
-0.2
Brentford 3 Portsmouth 2 -3.7
-2.2
-0.1
Sheff Utd 2 Swindon 0 -3.4
-2.4
-0.1
Stevenage 0 Yeovil 2 -1.5
-2.1
-0.1
Oldham 1 Yeovil 0 +0.5
+1.2
+0.1
Sheff Utd 2 Brentford 2 -0.1
+0.5
+0.0
Week of 4/20100.0*Chance wins title100.0*Championship100.0*Average seed
Doncaster 0 Notts County 1 -30.7
-23.4
-0.7
Hartlepool 1 Brentford 1 +7.8
+1.2
+0.1
Bournemouth 3 Carlisle 1 -7.2
-3.9
-0.1
Portsmouth 3 Sheff Utd 0 +0.6
+1.3
Week of 4/27100.0*Chance wins title100.0*Championship100.0*Average seed
Brentford 0 Doncaster 1 +51.5
Yes
+1.0
Tranmere 0 Bournemouth 0 +4.5
+0.0
Points
Chance Will Win Championship