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 -2.7
-0.6
van Barneveld 6 Cross 6 +0.1
+0.1
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
Anderson 3 van Barneveld 7 -7.1
-0.5
Gurney 6 Smith 6 +1.5
Cross 2 van Gerwen 7 +0.2
Week of 5/10100.0*Chance in playoffs100.0*Average seed
van Gerwen 5 Anderson 7 In
+0.4
Wright 6 Gurney 6 +5.3
+0.1
Smith 6 van Barneveld 6 +0.2
Whitlock 6 Cross 6 +0.1
Games Above .500
Chance Will Make Playoffs