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 +21.0
+11.7
+0.4
Shrewsbury 0 Bournemouth 3 -10.5
-4.9
-0.2
Brentford 3 Portsmouth 2 -6.7
-3.8
-0.1
Sheff Utd 2 Swindon 0 -2.7
-2.0
-0.1
Sheff Utd 2 Brentford 2 +1.6
+0.7
+0.0
Stevenage 0 Yeovil 2 -1.3
-1.7
-0.1
Oldham 1 Yeovil 0 +0.4
+1.0
Week of 4/20100.0*Chance wins title100.0*Championship100.0*Average seed
Doncaster 0 Notts County 1 -19.7
-11.7
-0.4
Bournemouth 3 Carlisle 1 -15.2
-6.3
-0.2
Hartlepool 1 Brentford 1 +3.7
+0.3
+0.0
Portsmouth 3 Sheff Utd 0 +0.5
+1.0
Week of 4/27100.0*Chance wins title100.0*Championship100.0*Average seed
Brentford 0 Doncaster 1 +35.8
Yes
+0.7
Tranmere 0 Bournemouth 0 +10.3
+0.1
Points
Chance Will Win Championship