BUENOS AIRES, Argentina--(BUSINESS WIRE)--Arcos Dorados Holdings, Inc. (NYSE:ARCO) (“Arcos Dorados” or the “Company”), Latin America’s largest restaurant chain and the world’s largest McDonald’s franchisee, today reported unaudited results for the first quarter ended March 31, 2015. First Quarter 2015 Key Results Consolidated revenues were $775.1 million, a 15.3% decline versus the first quarter of 2014. On an organic basis and excluding Venezuela, consolidated revenues grew 6.8%. Systemwide co