How are these numbers calculated?

Big Games

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

Sunday, 4/5100.0*Chance wins title100.0*Promoted100.0*Average seed
Croatia 1 Kazakhstan 12 -2.1
-2.1
Great Britain 4 Poland 0 +2.1
+2.1
+0.1
Monday, 4/6100.0*Chance wins title100.0*Promoted100.0*Average seed
Great Britain 0 Kazakhstan 2 No
No
-0.5
Points
Chance Will Win Championship