i am new and i need help quick plz help i am so confused and plz be honest

$\frac{\frac{4}{7}}{-\frac{3}{8}} =-\frac{\frac{4}{7}}{\frac{3}{8}} =-\frac{4\cdot \:8}{7\cdot \:3} =-\frac{4\cdot \:8}{21} =-\frac{32}{21}$ 

thx so much