Dividing by a fraction means multiplying by its reciprocal.<br><br>
&bull; \( \frac{4}{15} \div \frac{1}{10} = \frac{4}{15} \times \frac{10}{1} \)<br>
&bull; \( = \frac{40}{15} = \frac{8}{3} \) (divide numerator and denominator by 5)<br><br>
Final Answer: A = 8, B = 3