$\displaystyle \frac{2}{45}$\displaystyle \frac{2}{45}

$\displaystyle \frac{1}{25}$\displaystyle \frac{1}{25}

$\displaystyle \frac{1}{2}$\displaystyle \frac{1}{2}

$\displaystyle \frac{4}{99}$\displaystyle \frac{4}{99}