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The library surveyed 240 people about their favorite movie. If 15% people chose documentaries, how many people chose documentaries

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36 people chose documentaries 
User Archr
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If the library surveyed 240 people and only 15% chose documentaries, then only 36 people chose documentaries and the other 204 chose something else other than documentaries. You had to get 15% into decimal form and to do that you move the "." in 15.0% left 2 places so you get 0.15. Then you multiply 240 by 0.15 and you get 36. 
User Mintedsky
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