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
Anderson 7 van Barneveld 4 +30.7
+0.9
Wade 7 Lewis 4 +5.3
+0.1
Taylor 3 Wright 7 +4.2
+0.1
Lewis 0 van Gerwen 7 +3.3
+0.1
Chisnall 6 van Gerwen 6 -0.3
-0.0
Week of 5/4100.0*Chance in playoffs100.0*Average seed
Wade 3 Anderson 7 +8.0
+0.3
van Gerwen 3 Taylor 7 -4.3
-0.3
Wright 7 Lewis 2 +0.9
van Barneveld 5 Chisnall 7 +0.6
+0.0
Week of 5/11100.0*Chance in playoffs100.0*Average seed
Taylor 7 Lewis 5 -0.3
van Gerwen 7 Anderson 4 -0.2
Games Above .500
Chance Will Make Playoffs