Dividing by a fraction is the same as multiplying by its inverse:
[tex]x\div\dfrac{a}{b}=x\cdot\dfrac{b}{a}[/tex]
So, we have
[tex]-\dfrac{7}{8}\div \left(-\dfrac{1}{4}\right)=-\dfrac{7}{8}\cdot(-4)[/tex]
Also, since negative times/divided by negative is positive, we can get rid of the minus signs:
[tex]-\dfrac{7}{8}\div \left(-\dfrac{1}{4}\right)=\dfrac{7}{8}\cdot \dfrac{1}{4}[/tex]
So, the black sheep is the third option.
