In a survey of teenagers, ⅔ responded that they got regular exercise, and ⅘ of those said that walking was their main form of exercise. What fraction of the teenagers mainly exercise by walking?
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⅔ of the teenagers get regular exercise so ⅔*⅘ = 2/3*4/5 = 8/15 of teenagers mainly walk for exercise. Answer: \boxed{\frac{8}{15}}.
1 answer