In order to compare the fractions, we need to put them in the same denominator.
Calculating the least common multiple between the denominators, we have 12, so we have:
[tex]\begin{gathered} \frac{1}{3}=\frac{4}{12} \\ \\ \frac{1}{2}=\frac{6}{12} \\ \\ \frac{3}{4}=\frac{9}{12} \end{gathered}[/tex]Now, comparing the fractions, we have:
[tex]\begin{gathered} \frac{4}{12}<\frac{6}{12}<\frac{9}{12} \\ \\ \frac{1}{3}<\frac{1}{2}<\frac{3}{4} \end{gathered}[/tex]So the correct order is:
1/3, 1/2, 3/4