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Anonymous
9/13 is already in simplest form. 13 is prime, it can't be divided by anything.
Wiki User
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That is it - there is no number that goes into
both 13 and 9
Especially as 13 is a Prime number anyway.
18/26 = 9/13
-81/117 = -9/13
9/13
It is: 9/117 = 1/13