Answer
$\frac{5}{14}$
Work Step by Step
First, you must get a common denominator, and in this case, it will be 14. Now you must make both fractions have a denominator of 14.
$\frac{2}{7}$=$\frac{4}{14}$. Now just subtract the numerators, and you will get your answer of $\frac{5}{14}$.