How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 2/10100.0*Chance in playoffs100.0*Major Playoff100.0*Demoted100.0*Average seed
Vice 0 Fnatic 2 +18.5
+6.7
-5.7
+0.8
Fnatic 2 496 0 +15.9
+10.6
No
+0.6
XctN 0 T1 2 -1.8
+0.1
-0.1
-0.1
Vice 0 Neon 2 +0.5
-8.9
-0.1
TNC 2 BOOM 0 -0.4
-0.4
Week of 2/17100.0*Chance in playoffs100.0*Major Playoff100.0*Demoted100.0*Average seed
Neon 1 Fnatic 2 In
+34.4
+0.8
T1 2 Vice 0 -4.7
+0.5
BOOM 2 XctN 0 -3.7
-0.1
496 0 TNC 2 -6.3
-0.2
If winner is:HomeAway
Week of 2/24100.0*Chance in playoffs100.0*Major Playoff100.0*Demoted100.0*Average seed
Fnatic vs TNCYes-37.5
+0.6-0.6
Neon vs T1-12.5+12.5
-0.4+0.4

What If

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

100100100100100100100100
If finish:Chance inMajorChance will finish regular season at seed
TPW-LplayoffsPlayoff12345678DemotedCount
61-0InYes100No26,095,236,271
50-1In25.0%252550No26,095,497,617
Total:In62.5%631225No52,190,733,888
Points
Chance Will Make Playoffs