How are these numbers calculated?

Big Games

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

If winner is:HomeDrawAway
Week of 4/28100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Brumbies vs Blues+9.8-4.7-16.6
+9.8-4.7-16.6
+1.1-0.5-1.8
Force vs Lions-6.6-4.6+1.6
-6.6-4.6+1.6
-0.6-0.4+0.1
Kings vs Rebels+1.6+1.1-2.9
+1.6+1.1-2.9
+0.1+0.1-0.2
Reds vs Waratahs+0.0+3.3-0.2
+0.0+3.3-0.2
+0.0+0.2-0.0
Cheetahs vs Crusaders-0.1-0.1+0.0
If winner is:HomeDrawAway
Week of 5/5100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Chiefs vs Reds+0.9-3.2-9.4
+0.9-3.2-9.4
+0.1-0.3-0.8
Sharks vs Force+1.5-4.8-6.9
+1.5-4.8-6.9
+0.1-0.4-0.6
Waratahs vs Blues-3.1+1.4+3.2
-3.1+1.4+3.2
-0.2+0.1+0.3
Rebels vs Lions-4.5+0.3+0.9
-4.5+0.3+0.9
-0.4+0.0+0.1
Cheetahs vs Highlanders-0.1-0.0+0.0
Bulls vs Crusaders-0.1-0.1+0.0

What If

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

100100100100100100100100100100100100100100100100100100
If finish:Chance inHomeChance will finish regular season at seed
TPW-OTLDplayoffsQuarterfinal123456789101112131415161718Count
407-000InYes0802014,154,734
386-001100.0%100.0%04852000004,363,593
366-010100.099.9044560000000189,379,556
5-002100.099.90445600000629,270
345-01199.899.70168400000052,857,310
4-00399.799.71684000047,394
325-02099.399.30148500000001,090,415,426
4-01299.199.1014850000005,781,556
3-00499.199.113860002,002
304-02197.197.13950012100230,833,428
3-01396.796.729401210319,931
2-00594.394.394653
284-03092.292.2290000520003,012,519,162
3-02289.589.5288016300018,565,876
2-01490.790.7289015309,537
1-006InYes1002
263-03179.679.60800006113000469,093,813
2-02376.476.40760712400713,348
1-01575.075.0759133128
243-04060.060.0060008211010004,348,564,798
2-03250.450.4050072515200026,270,655
1-02453.153.10530523163013,159
222-04131.431.431011431184000472,714,016
1-03325.725.72611633204000631,125
0-02520.720.721223616687
202-05012.012.01200832321320003,325,305,620
1-0426.16.1606283719400016,552,425
0-0347.17.1705273719405,474
181-0511.21.21005243825610226,438,122
0-0430.40.40004203828810188,125
161-0600.10.100019293719301,260,392,030
0-0520.00.00006244025503,745,756
140-061OutNo003204330340,657,080
120-070OutNo01937476186,597,065
Total:52.8%52.8%025100000491196421014,997,761,656
Points
Chance Will Make Playoffs