9/13 is a proper fraction in its simplest form. (13 is prime).
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It is: 26/18 = 13/9
13% = 0.13 as a decimal 0.13 as a fraction is 13/100
fraction of 13 divided by 6 = 13/6
-14 divided by 13 as a fraction = -14/13
1.38461538 as a fraction is 18/13, or 1 and 5/13.