Equivalent and Simple Fraction

The fraction $\frac{21}{47}$ is not in its simplest form?

What is a simple fraction? Give examples.

Reduce $\frac{42}{63}$ in its simplest form.

Write the next five equivalent fractions of the given fraction.

$\frac{2}{5}$

Write the next five equivalent fractions of the given fraction.

$\frac{1}{3}$

Write the next five equivalent fractions of the given fraction.

$\frac{3}{4}$

Write the next five equivalent fractions of the given fraction.

$\frac{1}{2}$

Find the missing number that make the fractions equivalent.

$\frac{5}{35}=\frac{1}{?}$.

Find five equivalent fractions of $\frac{6}{7}$.

Find five equivalent fractions of $\frac{4}{7}$.