How are these numbers calculated?

Big Games

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

Week of 2/23100.0*Chance in playoffs100.0*Average seed
BRM 47 DET 32 +6.3
+0.8
MIN 55 MTL 51 +2.3
+0.1
OSA 59 OTW 56 +2.1
+0.1
CHI 64 HFD 60 +1.9
+0.1
ANA 42 ADK 61 -0.1
-0.0
KEL 55 PHI 43 +0.1
Week of 3/2100.0*Chance in playoffs100.0*Average seed
OTW 59 BRM 66 +19.8
+0.8
MTL 71 DET 36 -5.7
-0.1
HFD 96 KEL 63 -4.5
-0.2
ADK 57 VIC 36 -0.7
-0.2
If winner is:HomeTieAway
Week of 3/9100.0*Chance in playoffs100.0*Average seed
HFD vs OTW-4.0+31.5-3.0
-0.0+0.3-0.0
BRM vs VIC+16.8-13.4Out
+0.9+0.3-0.9
EDM vs MTL+9.8-8.0-8.0
+0.1-0.1-0.1
WPG vs ADK+0.2+0.1-0.3

What If

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

100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-OTL-OTTplayoffs123456789101112131415161718Count
241-00-0030.6%328697,234,853
230-00-010.40752321,607,173
220-01-00Out251487,227,894
Total:13.8%11239252216,069,920
Points
Chance Will Make Playoffs