$\displaystyle \frac{1}{4}$\displaystyle \frac{1}{4}

$\displaystyle \frac{2}{7}$\displaystyle \frac{2}{7}

$\displaystyle \frac{6}{19}$\displaystyle \frac{6}{19}

$\displaystyle \frac{3}{10}$\displaystyle \frac{3}{10}