Common Denominators and Equivalent Fractions

This is an example of a/an _______.

Write the pair of fractions as a pair of fractions with a common denominator

 $\frac{1}{3}$  and  $\frac{1}{4}$  

Write the pair of fractions as a pair of fractions with a common denominator

 $\frac{3}{5}$  and  $\frac{4}{10}$  

These two fractions are equivalent:
 $\frac{3}{4}$  and  $\frac{1}{2}$  

Write the pair of fractions as a pair of fractions with a common denominator

 $\frac{3}{4}$  and  $\frac{5}{8}$