\(-\dfrac{3}{7} \div ( -\dfrac{7}{3} ) = \) _____
\(-\dfrac{3}{7} \div ( -\dfrac{7}{3} ) = \dfrac{9}{49}\)
Dividing is multiplying by reciprocal: \(-\dfrac{3}{7} \times -\dfrac{3}{7} = \dfrac{9}{49}\).