The fraction $\frac{4}{6}$ can be simplified by dividing both the numerator and the denominator by their greatest common divisor (GCD), which is 2.

$\frac{4}{6} = \frac{4 \div 2}{6 \div 2} = \frac{2}{3}$

So, $\frac{4}{6}$ simplifies to $\frac{2}{3}$.

Would you like further explanation or have any other questions about fractions? Here are some related questions for you:

1. How do you find the greatest common divisor (GCD) of two numbers?
2. What are equivalent fractions and how do you find them?
3. How do you add or subtract fractions with different denominators?
4. How can you multiply and divide fractions?
5. What is the decimal equivalent of $\frac{2}{3}$?

Tip: Always simplify fractions to their lowest terms to make calculations easier.