How are these numbers calculated?

Big Games

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

Friday100.0*Chance wins title100.0*Average seed
Norwalk 48 Ridgefield 60 No
-0.2
Staples 54 Bassick 32 No
-0.3
Trumbull 54 Darien 19 -1.5
-0.1
Saturday100.0*Chance wins title100.0*Average seed
Staples 37 Ridgefield 40 +0.5
Monday100.0*Chance wins title100.0*Average seed
Trumbull 62 Danbury 43 -0.3
Games Above .500
Chance Will Win Championship