1/3:1/4

To simplify the ratio \( \frac{1}{3} : \frac{1}{4} \), you can divide the two fractions:

\[ \frac{1}{3} \div \frac{1}{4} = \frac{1}{3} \times \frac{4}{1} = \frac{4}{3} \]

So, the ratio \( \frac{1}{3} : \frac{1}{4} \) simplifies to \( 4 : 3 \).