Express the following rational number in the standard form.
$\frac{-7}{-8}$

Mark the following pairs of rational numbers on the number line.

$\frac{3}{4} \mathrm{and} -\frac{1}{4}$

Mark the following pairs of rational numbers on the number line.

$\frac{-3}{5} \mathrm{and} \frac{2}{5}$

Mark the following pairs of rational numbers on the number line.

$\frac{5}{6} \mathrm{and} -\frac{2}{3}$

Mark the following pairs of rational numbers on the number line.

$\frac{2}{5} \mathrm{and} \frac{-4}{5}$

Mark the following pairs of rational numbers on the number line.

$\frac{-1}{ 4} \mathrm{and} \frac{-5}{4}$