How are these numbers calculated?

Big Games

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

Week of 7/1100.0*Super 8100.0*League 1 Shield100.0*Average seed
Workington 46 London 16 +14.7
-14.7
+0.6
Hunslet 56 Coventry 24 -1.9
+1.9
-0.1
Oxford 20 North Wales 52 -1.8
+1.8
-0.1
Barrow 36 All Golds 6 +1.6
-1.6
+0.0
Whitehaven 28 Keighley 22 +0.8
-0.8
+0.0
Doncaster 10 Newcastle 20 -0.5
+0.5
-0.1
Doncaster 34 Oxford 16 -0.2
+0.2
-0.1
Toronto 64 York 22 +0.0
Week of 7/8100.0*Super 8100.0*League 1 Shield100.0*Average seed
North Wales 12 Whitehaven 12 -6.2
+6.2
-0.1
Workington 30 Keighley 30 +5.3
-5.3
-0.4
London 30 Hunslet 16 +5.2
-5.2
+0.1
Toronto 62 All Golds 10 +0.5
-0.5
+0.0
York 68 Hemel 6 -0.0
South Wales 12 Doncaster 70 -0.0
Newcastle 68 Coventry 20 -0.0
Week of 7/15100.0*Super 8100.0*League 1 Shield100.0*Average seed
York 34 Workington 0 -2.8
+2.8
-0.3
Keighley 92 Oxford 6 -2.2
+2.2
-0.2
Coventry 13 North Wales 36 -2.1
+2.1
-0.0
Games Above .500
Chance Will Win Championship