SELECT (xsd:float(?population)/xsd:float(?area) AS ?density) ?countryLabel  WHERE {
    ?country wdt:P31 wd:Q6256.
    ?country wdt:P38 wd:Q4916;
    wdt:P1082 ?population;
    wdt:P2046 ?area.

   SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }

 }
ORDER BY DESC(?density)