How are these numbers calculated?

Big Games

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

Tuesday, 12/8100.0*Chance in playoffs100.0*Average seed
Kleibrink 7 McCarville 4 +20.6
+1.0
Webster 7 Jones 8 +1.8
+0.1
Lawton 10 Holland 4 -1.1
Scott 7 Bernard 9 -0.7
Wednesday, 12/9100.0*Chance in playoffs100.0*Average seed
Lawton 5 Kleibrink 6 +18.1
+0.7
Bernard 8 Kleibrink 5 -12.8
-0.7
Scott 5 McCarville 9 -4.0
-0.1
Holland 4 McCarville 3 +4.0
+0.1
Webster 5 Holland 6 +3.9
+0.1
Webster 11 Scott 3 -3.9
-0.1
Jones 4 Lawton 6 -0.2
Bernard 8 Jones 5 +0.2
Thursday, 12/10None
Games Above .500
Chance Will Make Playoffs