The fraction \( \frac{8}{12} \) can be simplified by finding the greatest common divisor (GCD) of 8 and 12, which is 4.
To simplify:
\[ \frac{8 \div 4}{12 \div 4} = \frac{2}{3} \]
Therefore, the fraction equivalent to \( \frac{8}{12} \) is \( \frac{2}{3} \).