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*Average seed
DUN 1 BRA 2 +20.5
+0.7
MAN 2 FIF 8 -16.6
-0.1
BRA 8 MAN 3 +10.3
+0.2
Week of 3/13100.0*Chance wins title100.0*Average seed
MAN 3 BRA 6 +37.2
+0.4
BRA 8 EDI 1 +7.3
+0.1
Week of 3/20100.0*Chance wins title100.0*Average seed
EDI 3 BRA 6 Yes
+0.1
Points
Chance Will Win Championship