20 Longest Borders compared to Continent

Which are the longest borders countries compared to the length of all borders in that? You are shown the %. Note that Country A always comes before Country B in alphabetical order
I hope I decided correctly what continent to consider for borders between countries in different continents! (eg Panama-Colombia in North America)
Despite this being a 'yellow box' quiz, guessing one occurrence of a country will reveal its presence in other pairs
Quiz by scambigol
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Last updated: January 13, 2016
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First submittedJanuary 13, 2016
Times taken30
Average score73.1%
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%
Country A
Country B
100
Indonesia
Papua New Guinea
54
Canada
United States
19
Mexico
United States
15
Argentina
Chile
10
Bolivia
Brazil
8
Kazakhstan
Russia
6.6
Brazil
Venezuela
6.1
Colombia
Venezuela
5.8
Guatemala
Mexico
5.6
Argentina
Paraguay
%
Country A
Country B
5.6
Honduras
Nicaragua
5.5
China
Mongolia
4.9
Brazil
Colombia
4.8
Bangladesh
India
4.7
Norway
Sweden
4.7
Brazil
Peru
4.6
Russia
Ukraine
4.5
Colombia
Peru
4.3
China
Russia
4.3
Ecuador
Peru
+1
Level 90
Jan 13, 2016
Nice!