RENAMING FRACTIONS WITH A SPECIFIED DENOMINATOR
• PRACTICE (online exercises and printable worksheets)
For a complete discussion, read the text.

To add or subtract fractions, the denominators must be the same.
This lesson gives you practice renaming fractions with a desired denominator.

EXAMPLES:
Question: Write $\,\displaystyle\frac{2}{7}\,$ with a denominator of $\,14\,$:

Solution: $\displaystyle\frac{2}{7} = \frac{4}{14}$

The key is to multiply by $\,1\,$ in the correct way!
The original denominator is $\,7\,$;
the desired denominator is $\,14\,$.
What must $\,7\,$ be multiplied by, to get $\,14\,$?   Answer: $\,2\,$

Thus, you multiply by $\,1\,$ in the form of $\,\displaystyle\frac{2}{2}\,$, as shown below:

$\displaystyle\frac{2}{7} = \frac{2}{7}\cdot\frac{2}{2} = \frac{4}{14}$
Master the ideas from this section