How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Tuesday, 5/25100.0*Chance in playoffs100.0*Average seed
Clayton 5 de Sousa 8 -20.0
-0.8
Wright 8 Van den Bergh 5 +7.7
+0.1
Anderson 4 van Gerwen 8 -1.0
-0.1
Wade 7 Aspinall 7 -0.1
+0.0
Wednesday, 5/26100.0*Chance in playoffs100.0*Average seed
Clayton 5 Wright 8 -17.6
-0.5
Wade 7 Van den Bergh 7 +4.1
+0.1
de Sousa 6 van Gerwen 8 +0.8
+0.1
Anderson 7 Aspinall 7 -0.2
+0.0
Thursday, 5/27100.0*Chance in playoffs100.0*Average seed
Van den Bergh 6 Clayton 8 In
+0.6
Wright 6 van Gerwen 8 +0.3
+0.1
Aspinall 3 de Sousa 8 -0.0
Games Above .500
Chance Will Make Playoffs