Compare the fractions by converting to a common denominator or using cross-multiplication.<br><br>
&bull; \( \frac{3}{4} = 0.75 \), \( \frac{2}{3} \approx 0.667 \), \( \frac{1}{5} = 0.2 \), \( \frac{1}{6} \approx 0.167 \).<br>
&bull; 0.75 is the largest value.<br>
&bull; \( \frac{3}{4} \) is the greatest fraction.<br><br>
Final Answer: A: \( \frac{3}{4} \)