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 -8.3
-0.1
Whitehaven 28 Keighley 22 +4.0
+0.2
Barrow 36 All Golds 6 -0.6
-0.1
Week of 7/8100.0*Chance wins title100.0*Average seed
Toronto 62 All Golds 10 -7.1
-0.1
North Wales 12 Whitehaven 12 No
Barrow 80 Oxford 10 -0.1
-0.1
Week of 7/15100.0*Chance wins title100.0*Average seed
Whitehaven 32 Barrow 6 +0.5
Games Above .500
Chance Will Win Championship