Here is a list of fractions.
2125303184201060 \frac{2}{12} \quad \frac{5}{30} \quad \frac{3}{18} \quad \frac{4}{20} \quad \frac{10}{60} 1223051832046010One of these fractions is not equivalent to 16\displaystyle \frac{1}{6}61
Write down this fraction.