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 -1.0
-0.0
Whitehaven 28 Keighley 22 +0.0
Barrow 36 All Golds 6 -0.0
Week of 7/8100.0*Chance wins title100.0*Average seed
Toronto 62 All Golds 10 -0.2
North Wales 12 Whitehaven 12 No
Barrow 80 Oxford 10 -0.0
Week of 7/15100.0*Chance wins title100.0*Average seed
Whitehaven 32 Barrow 6 +0.4
Games Above .500
Chance Will Win Championship