Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2w4/ Esercizi: http://www.khanacademy.org/exercises?exid=ratio_word_problems Traduzione in Italiano del video Alternate Solution to Ratio Problem (HD Version) http://www.youtube.com/watch?v=-xyTz0WZ1W4 http://www.khanacademy.org/video/alternate-solution-to-ratio-problem--hd-version?playlist=Algebra