How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Friday, 12/20100.0*Chance wins title100.0*Average seed
Orange County 2 Moose Jaw 3 -25.1
-0.3
Moose Jaw 4 Orange County 1 -18.9
-0.2
Saturday, 12/21100.0*Chance wins title100.0*Average seed
Moose Jaw 0 Orange County 4 +25.1
+0.3
Sunday, 12/22100.0*Chance wins title100.0*Average seed
Orange County 0 Moose Jaw 1 No
-0.5
Games Above .500
Chance Will Win Championship