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
van Barneveld 6 Cross 6 +0.7
-0.1
Whitlock 7 Anderson 5 +0.1
+0.3
Gurney 6 van Gerwen 6 +0.1
+0.0
Smith 1 van Gerwen 7 +0.1
+0.1
Wright 1 Smith 7 -0.1
-0.1
Week of 5/3100.0*Chance in playoffs100.0*Average seed
Cross 2 van Gerwen 7 -1.2
-0.4
Gurney 6 Smith 6 In
+0.1
Anderson 3 van Barneveld 7 +0.5
+0.2
Week of 5/10100.0*Chance in playoffs100.0*Average seed
van Gerwen 5 Anderson 7 -0.3
Whitlock 6 Cross 6 -0.2
Smith 6 van Barneveld 6 -0.2
Games Above .500
Chance Will Make Playoffs