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
Wade 7 Lewis 4 -18.4
-0.8
Lewis 0 van Gerwen 7 -18.3
-0.8
Taylor 3 Wright 7 +4.2
Anderson 7 van Barneveld 4 -0.7
Chisnall 6 van Gerwen 6 +0.5
+0.0
If winner is:HomeDrawAway
Week of 5/4100.0*Chance in playoffs100.0*Average seed
Wright vs Lewis-12.4-6.0+15.4
-0.8-0.1+0.8
van Gerwen vs Taylor+3.9+0.9-4.3
+0.2-0.0-0.1
van Barneveld vs Chisnall-2.7+2.1+1.6
Wade vs Anderson+1.4-0.6-1.1
-0.1-0.0+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-Lplayoffs12345678910EliminatedCount
172-0-065.2%1451296No68,427,267
161-1-013.811339408No68,258,341
151-0-10.61943444No136,628,537
0-2-0Out242524No17,056,790
140-1-1Out85934No68,276,812
130-0-2Out2971No68,416,933
Total:12.8%21114243118No427,064,680
Games Above .500
Chance Will Make Playoffs