Write the following rational number in the standard form: $\frac{-247}{-57}$

Write the following rational number in the standard form: $4\frac{1}{23}$

Write the following rational number in the standard form: $\frac{299}{-60}$

Are numbers $\frac{16}{-12}$ and $\frac{-20}{15}$ equal? 

Whether the following is the pair of equivalent fractions?

$\frac{-18}{7}, \frac{-36}{14}$

Whether the following is the pair of equivalent fractions?

$\frac{6}{11}, \frac{11}{8}$

Whether the following is the pair of equivalent fractions?

$\frac{-9}{5}, \frac{45}{-25}$

Whether the following is the pair of equivalent fractions?

$\frac{-3}{16}, \frac{-1}{3}$

Whether the following is the pair of equivalent fractions?

$\frac{9}{16}, \frac{-27}{-48}$