How are these numbers calculated?

Big Games

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

Week of 6/5100.0*Chance in playoffs100.0*Average seed
Argentina 44 Scotland 13 +20.1
+1.9
Argentina 28 Samoa 16 Out
-0.1
Wales 26 Scotland 21 -2.3
-0.3
New Zealand 14 Australia 10 +1.4
-0.0
South Africa 31 England 24 +1.0
France 45 USA 3 -0.2
Ireland 46 Fiji 3 -0.2
-0.1
Wales 42 Samoa 3 -0.1
France 6 England 30 -0.1
Ireland 19 Australia 15 -0.1
South Africa 97 USA 0 -0.1
New Zealand 59 Fiji 6 -0.1
If winner is:HomeDrawAway
Week of 6/13100.0*Chance in playoffs100.0*Average seed
Wales vs Argentina+1.4+2.2-1.5
England vs USA-0.2+0.2+0.2
France vs South Africa+0.2+0.2-0.2
New Zealand vs Ireland+0.0-0.2+0.0

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs123456789101112Count
261-0-0Out4741121,571,975,952
240-1-0Out10073,942,467
220-0-1Out3749151,571,990,997
Total:Out20247232063,217,909,416
Games Above .500
Chance Will Make Playoffs