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*Chance wins title100.0*Average seed
Toronto 64 York 22 +13.8
+0.2
Barrow 36 All Golds 6 -5.8
-0.1
Whitehaven 28 Keighley 22 -4.0
Week of 7/8100.0*Chance wins title100.0*Average seed
Toronto 62 All Golds 10 +12.7
+0.1
Barrow 80 Oxford 10 -5.9
-0.1
North Wales 12 Whitehaven 12 Yes
Week of 7/15None
Games Above .500
Chance Will Win Championship