Step-by-step explanation:
[tex]1 \frac{1}{3} \div \frac{3}{7} \\ \\ = \frac{1 \times 3 + 1}{3} \div \frac{3}{7} \\ \\ = \frac{4}{3} \div \frac{3}{7} \\ \\ = \frac{4}{3} \times \frac{7}{3} \\ \\ = \frac{4 \times 7}{3 \times 3} \\ \\ = \frac{28}{9} \\ \\ = 3 \frac{1}{9} [/tex]
