Answer
$\dfrac{v}{7}$
Work Step by Step
Simplify by factoring the numerator and the denominator then cancelling common factors to have:
$\require{cancel}
\\=\dfrac{5v^2}{7\cdot5\cdot v}
\\=\dfrac{\cancel{5v^2}v}{7\cdot\cancel{5}\cdot \cancel{v}}
\\=\dfrac{v}{7}$
