7/16 ÷ (-21/32)

1. Rewrite division as multiplication by the reciprocal: $$\frac{7}{16} \times (-\frac{32}{21})$$

2. Multiply the fractions: $$- \frac{7 \times 32}{16 \times 21}$$

3. Simplify: $$- \frac{224}{336} = -\frac{2}{3}$$