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
Wade 7 Lewis 4 -18.4
-0.8
Lewis 0 van Gerwen 7 -18.3
-0.8
Taylor 3 Wright 7 +4.2
Anderson 7 van Barneveld 4 -0.7
Chisnall 6 van Gerwen 6 +0.5
+0.0
Week of 5/4100.0*Chance in playoffs100.0*Average seed
Wright 7 Lewis 2 -12.4
-0.8
van Gerwen 3 Taylor 7 -4.3
-0.1
van Barneveld 5 Chisnall 7 +1.6
Wade 3 Anderson 7 -1.1
+0.2
Week of 5/11100.0*Chance in playoffs100.0*Average seed
Taylor 7 Lewis 5 -0.6
Wright 7 van Barneveld 1 +0.2
Chisnall 6 Wade 6 -0.2
Games Above .500
Chance Will Make Playoffs