To convert the whole number 12815 to a mixed number, you can represent it as the sum of a whole number and a fraction. A mixed number consists of a whole number part and a fractional part.
Since 12815 is a whole number, we can express it as a mixed number by writing it as:
\[ 12815 = 12815 \frac{0}{1} \]
So, the mixed number representation of 12815 is:
\[ 12815 \frac{0}{1} \]
Alternatively, you can simply state that 12815 is the whole number part and the fractional part is zero.