Question

add or subtract as indicated.

\\\frac{7}{20} - \frac{7}{10}\\

\\\frac{7}{20} - \frac{7}{10} = \square\\

Explanation:

Find a common denominator

$$ \text{LCD}(20, 10) = 20 $$

$$ \frac{7}{10} = \frac{7 \times 2}{10 \times 2} = \frac{14}{20} $$

Subtract the numerators

$$ \frac{7}{20} - \frac{14}{20} = \frac{7 - 14}{20} = -\frac{7}{20} $$

Answer:

Add or subtract as indicated.

\(\frac{7}{20} - \frac{7}{10} =\) <blank>\(-\frac{7}{20}\)</blank>