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
New Zealand 59 Fiji 6 +20.1
+1.9
New Zealand 14 Australia 10 Out
-1.7
Ireland 46 Fiji 3 -3.1
+0.3
Wales 26 Scotland 21 +1.6
-0.1
Argentina 28 Samoa 16 +1.5
-0.1
South Africa 31 England 24 +1.4
France 45 USA 3 -0.3
Ireland 19 Australia 15 -0.1
Wales 42 Samoa 3 -0.1
If winner is:HomeDrawAway
Week of 6/13100.0*Chance in playoffs100.0*Average seed
New Zealand vs Ireland-1.4-2.1+1.5
England vs USA-0.2+0.2+0.2
France vs South Africa+0.2+0.2-0.2

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs123456789101112Count
261-0-0Out4141181,571,972,993
240-1-0Out1495073,951,582
220-0-1Out3048221,571,984,841
Total:Out1523112021103,217,909,416
Games Above .500
Chance Will Make Playoffs