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OpenStudy (anonymous):
Which of the following forms a proportion with twenty-one over nine?
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OpenStudy (anonymous):
21/9 is equivalent to 7/3 Does that answer your question? 7(3)/3(3) = 21/9
OpenStudy (anonymous):
21(3)/9(3) = 63/27 as well.
OpenStudy (anonymous):
ty
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