1. **State the problem:** Calculate $\frac{3}{4} - \frac{1}{2}$ and simplify the answer if necessary. 2. **Formula and rules:** To subtract fractions, they must have a common denominator. Find the least common denominator (LCD) of the denominators. 3. **Find the LCD:** The denominators are 4 and 2. The LCD of 4 and 2 is 4. 4. **Rewrite fractions with the LCD:** $$\frac{3}{4} - \frac{1}{2} = \frac{3}{4} - \frac{2}{4}$$ 5. **Subtract the numerators:** $$\frac{3}{4} - \frac{2}{4} = \frac{3 - 2}{4} = \frac{1}{4}$$ 6. **Simplify if possible:** $\frac{1}{4}$ is already in simplest form. **Final answer:** $\frac{1}{4}$