Mouthwash dilema

Team: 
PFMS A-Team
Topic: Proportional Reasoning
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While playing video games a PSA comes on screen. He has to solve the problem to get back to game. Can he do it in time before he loses?

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