1. **State the problem:** Simplify the fraction $\frac{602}{20}$. 2. **Formula and rules:** To simplify a fraction, divide the numerator and denominator by their greatest common divisor (GCD). 3. **Find the GCD:** The GCD of 602 and 20 is 2. 4. **Divide numerator and denominator by the GCD:** $$\frac{602}{20} = \frac{\cancel{2}301}{\cancel{2}10}$$ 5. **Result:** The simplified fraction is $\frac{301}{10}$. 6. **Convert to mixed number (optional):** $$301 \div 10 = 30 \text{ remainder } 1$$ So, $$\frac{301}{10} = 30 \frac{1}{10}$$ **Final answer:** $\frac{301}{10}$ or $30 \frac{1}{10}$.