1. The problem is to simplify the expression $\log 3 - \log 4$. 2. Recall the logarithm property: $\log a - \log b = \log \left( \frac{a}{b} \right)$. 3. Apply this property to the given expression: $$\log 3 - \log 4 = \log \left( \frac{3}{4} \right)$$ 4. So, the simplified form of $\log 3 - \log 4$ is $\log \left( \frac{3}{4} \right)$.