How are these numbers calculated?

Big Games

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

Week of 8/14100.0*Chance wins title100.0*League One100.0*Conference100.0*Average seed
Notts County 0 Mansfield 2 +1.2
+2.0
+0.1
Week of 8/15100.0*Chance wins title100.0*League One100.0*Conference100.0*Average seed
Barnet 2 Northampton 0 -21.1
-47.5
-3.1
Northampton 3 Exeter 0 +7.8
+16.9
No
+1.9
Crawley 0 Portsmouth 0 +4.0
+3.4
+0.2
Morecambe 0 Wycombe 1 -3.7
-2.6
-0.1
Leyton Orient 3 Stevenage 0 -2.1
-2.3
-0.1
Plymouth 1 Portsmouth 2 -1.8
-1.5
-0.1
Barnet 0 Wycombe 2 -1.7
-1.7
-0.1
York 1 Hartlepool 2 -1.5
-1.8
-0.1
Dag & Red 1 Leyton Orient 3 -1.5
-1.8
-0.1
Hartlepool 1 Newport 0 -1.4
-2.2
-0.1
Carlisle 4 Cambridge 4 +1.2
+0.9
+0.1
Luton 2 Oxford Utd 2 +0.1
+0.9
+0.1
Wimbledon 1 Cambridge 2 -0.1
-2.0
-0.1
Accrington 1 Mansfield 0 +0.1
+1.6
+0.1
Crawley 1 Wimbledon 2 +0.3
+0.0
Luton 0 Bristol Rovers 1 -0.4
-0.1
Dag & Red 1 Exeter 2 -0.3
Morecambe 1 Accrington 0 +0.3
+0.0
Plymouth 4 Carlisle 1 -0.1
Oxford Utd 3 Notts County 1 +0.1
+0.0
Yeovil 0 Bristol Rovers 1 +0.1
Week of 8/22100.0*Chance wins title100.0*League One100.0*Conference100.0*Average seed
Stevenage 2 Hartlepool 0 +2.6
+0.3
Portsmouth 3 Morecambe 3 +0.6
+0.3
Cambridge 0 Crawley 3 +1.0
+0.3
Newport 2 Leyton Orient 3 No
-0.1
Northampton 0 Plymouth 2 No
No
-2.6
Wycombe 1 Dag & Red 1 No
Exeter 0 York 0 +0.6
+0.2
Mansfield 1 Oxford Utd 1 +0.5
+0.1
Bristol Rovers 3 Barnet 1 -0.5
-0.1
Notts County 1 Accrington 1 +0.1
+0.2
Carlisle 1 Wimbledon 1 +0.0
Points
Chance Will Win Championship