Dividing by a fraction means multiplying by its reciprocal, then simplify.<br><br>
&bull; \( \frac{1}{2} \div \frac{3}{4} = \frac{1}{2} \times \frac{4}{3} = \frac{4}{6} \)<br>
&bull; Simplify: HCF of 4 and 6 is 2. \( \frac{4}{6} = \frac{2}{3} \)<br><br>
Final Answer: A = 2, B = 3