The simplest form of the fraction would be [tex] \frac{5}{6} [/tex].
The GCF (greatest common factor) of 10 and 12 is 2, so divide that by the numerator and denominator to simplify the fraction.
[tex] \frac{10/2}{12/2} [/tex]=[tex] \frac{5}{6} [/tex]
You would need to divide the top and bottom by a common factor, which is 2. The result would be 5/6