How are these numbers calculated?

Big Games

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

Tuesday, 4/20100.0*Chance in playoffs100.0*Eliminated100.0*Average seed
Wright 4 Wade 7 -12.7
+12.7
-1.4
Cross 4 Van den Bergh 7 +2.1
-2.1
+0.0
Aspinall 6 Clayton 6 -0.5
+0.5
-0.0
van Gerwen 6 Anderson 6 -0.5
+0.5
-0.0
Durrant 4 de Sousa 7 -0.2
+0.2
-0.1
Wednesday, 4/21100.0*Chance in playoffs100.0*Eliminated100.0*Average seed
Wright 7 Durrant 1 +11.1
-11.1
+0.4
Cross 5 Aspinall 7 +10.7
-10.7
+0.2
Wade 7 Clayton 2 -2.9
+2.9
-0.1
Anderson 5 Van den Bergh 7 +0.8
-0.8
+0.1
van Gerwen 7 de Sousa 4 +0.2
-0.2
+0.1
Thursday, 4/22100.0*Chance in playoffs100.0*Eliminated100.0*Average seed
de Sousa 6 Wright 6 -0.4
Clayton 7 van Gerwen 3 -0.4
Aspinall 7 Anderson 2 +0.2
Van den Bergh 6 Wade 6 -0.2
Games Above .500
Chance Will Make Playoffs