How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 3/6100.0*Chance wins title100.0*Bottom Half100.0*Average seed
Knights 56 Migos 68 +0.2
-0.6
+0.1
Used To Be Good 49 Size Matters 47 +0.1
+0.1
Free Ballin 58 Austin Tropics 49 -0.1
Week of 3/13100.0*Chance wins title100.0*Bottom Half100.0*Average seed
Migos 72 Tall Boys 74 -1.0
+2.6
-0.2
Size Matters 78 Austin Tropics 52 -0.2
+0.8
-0.0
Week of 3/20100.0*Chance wins title100.0*Bottom Half100.0*Average seed
Migos 58 Used To Be Good 48 +0.5
-2.8
+0.1
En Fuego 54 Size Matters 78 -0.1
+0.6
-0.0
Games Above .500
Chance Will Win Championship