How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Sunday, 7/5100.0*Chance in playoffs100.0*Round of 4100.0*Average seed
Papua New Guinea 0 New Zealand 1 In
Yes
-0.1
Tahiti 2 Vanuatu 1 -0.1
Monday, 7/6None
Tuesday, 7/7100.0*Chance in playoffs100.0*Round of 4100.0*Average seed
New Caledonia 0 New Zealand 5 -0.8
Tahiti 0 Fiji 0 +0.2
Points
Chance Will Make Playoffs