$\displaystyle \frac{1}{15}$\displaystyle \frac{1}{15}

$\displaystyle \frac{ 1}{33}$\displaystyle \frac{ 1}{33}

$\displaystyle \frac{15}{33}$\displaystyle \frac{15}{33}

$\displaystyle \frac{15}{18}$\displaystyle \frac{15}{18}