13/5
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35 ÷ 21/13 = 455/27 or 1623/27
To solve this problem, flip 2 over 13 so that it becomes 13 over 2. Then mutiply. 1/9*13/2=13/18 (or, in decimal form, .7222222222).
As a decimal, 0.076923 repeating
(63/4) / (15/8) = (27/4) / (13/8) = (27/4)*(8/13) = 54/13 = 42/13
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