Question

What is a rational number between -1/4 and -7/8??

Answer 1

Any negative number that you can write down, between  -0.875  and  -0.25 ,
is a correct answer to this question.

Answer 2

$-\frac{1}{4}=-\frac{1\times2}{4\times2}=-\frac{2}{8}\\\\-\frac{7}{8} < -\frac{6}{8} < -\frac{5}{8} < -\frac{4}{8} < -\frac{3}{8} < -\frac{2}{8}=-\frac{1}{4}$

There are only examples. Between -1/4 and -7/8 are infinitely many rational numbers.