How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Chance in playoffs100.0*Average seed
Whitlock 7 Anderson 5 +0.5
Wright 1 Smith 7 Out
+0.1
van Barneveld 6 Cross 6 -0.1
Week of 5/3100.0*Chance in playoffs100.0*Average seed
Wright 7 Whitlock 4 -0.7
Anderson 3 van Barneveld 7 -0.2
Gurney 6 Smith 6 -0.0
Week of 5/10100.0*Chance in playoffs100.0*Average seed
Whitlock 6 Cross 6 +0.2
Games Above .500
Chance Will Make Playoffs