Which Problem Equals 25 Percent?
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http://www.lerc.nasa.gov/Other_Groups/K12/p_test/math_9/math_p_q14.html  


NASA Lewis Learning Technologies Project  
Which problem has an answer of 25 percent? 1) 10 is what percent of 50? 2) 25 is what percent of 75? 3) 25 is what percent of 125? 4) 20 is what percent of 80? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.  


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