The Choosing of the Mouthwash

Team Llama
Topic: Proportional Reasoning
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Angela and Justine are getting new mouthwash and are wondering how many dentists will recommend Minty Fresh Mouthwash over Squeaky Clean Mouthwash (epic name). LIKE US!! (you don't even have to watch it:)

Common Core Standards: 6.RP.3
Problem #: 
26 (2011-2012)
Problem Difficulty Level: 2 [?]