How are these numbers calculated?

Big Games

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

Week of 4/27100.0*Chance in playoffs100.0*Average seed
Taylor 3 Wright 7 -17.9
-0.6
Wade 7 Lewis 4 +6.9
+0.1
Lewis 0 van Gerwen 7 +4.1
+0.1
Anderson 7 van Barneveld 4 -0.4
Chisnall 6 van Gerwen 6 -0.2
-0.0
Week of 5/4100.0*Chance in playoffs100.0*Average seed
van Gerwen 3 Taylor 7 +31.2
+0.8
van Barneveld 5 Chisnall 7 +3.3
+0.0
Wright 7 Lewis 2 +1.9
+0.1
Wade 3 Anderson 7 -1.8
-0.1
Week of 5/11100.0*Chance in playoffs100.0*Average seed
Chisnall 6 Wade 6 In
+0.0
Taylor 7 Lewis 5 In
+0.3
van Gerwen 7 Anderson 4 +0.2
Games Above .500
Chance Will Make Playoffs