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
Anderson 4 van Gerwen 8 -4.7
-0.5
Wright 8 Van den Bergh 5 +1.5
-0.1
Wade 7 Aspinall 7 -0.4
-0.0
Clayton 5 de Sousa 8 -0.1
Wednesday, 5/26100.0*Chance in playoffs100.0*Average seed
Clayton 5 Wright 8 -0.2
Wade 7 Van den Bergh 7 +0.0
Thursday, 5/27100.0*Chance in playoffs100.0*Average seed
Anderson 6 Wade 8 -0.5
Wright 6 van Gerwen 8 +0.2
Games Above .500
Chance Will Make Playoffs