if you divide a fraction by another fraction, this is equivalent to mupltiplying by its inverse:
so [tex] \frac{4}{7} [/tex] divided by[tex] \frac{7}{8} [/tex]
is equivalent to
[tex] \frac{4}{7} [/tex] multiplied by by[tex] \frac{7}{8} [/tex]
which is
[tex] \frac{4}{7}* \frac{7}{8}= \frac{4*7}{7*8}= \frac{4}{8}= \frac{1}{2} [/tex]
so the answer is [tex] \frac{1}{2} [/tex] which is also 0.5