Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2w5/ Esercizi: http://www.khanacademy.org/exercises?exid=ratio_word_problems Traduzione in Italiano del video Introduction to Ratios http://www.youtube.com/watch?v=UsPmg_Ne1po http://www.khanacademy.org/video/introduction-to-ratios?playlist=Algebra Help us caption & translate this video! http://amara.org/v/B2w5/