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
Lewis 4 Wade 7 -18.7
-0.8
vanGerwen 7 Lewis 0 -18.6
-0.8
Wright 7 Taylor 3 +4.3
vanBarneveld 4 Anderson 7 -0.7
vanGerwen 6 Chisnall 6 +0.5
+0.0
If winner is:HomeDrawAway
Week of 5/4100.0*Chance in playoffs100.0*Average seed
Lewis vs Wright+15.7-5.8-12.4
+0.8-0.1-0.8
Taylor vs vanGerwen-4.4+0.8+4.0
-0.1-0.0+0.2
Chisnall vs vanBarneveld+1.6+2.1-2.8
Anderson vs Wade-1.0-0.5+1.3
+0.2-0.0-0.2

What If

Chances based on how well the Lewis finish out the regular season.   Explain

100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs12345678910RelegatedCount
172-0-067.0%1453285No2,573,083,666
161-1-014.711440397No2,896,225,191
151-0-10.61943434No5,137,549,832
0-2-0Out244504No816,346,951
140-1-1Out85834No2,896,226,010
130-0-2Out2872No2,573,029,910
Total:12.9%21114243118No16,892,461,560
Games Above .500
Chance Will Make Playoffs