1/3:1/6

To simplify the ratio \( \frac{1}{3} : \frac{1}{6} \), you can rewrite it as a division of the two fractions:

\[ \frac{1/3}{1/6} \]

When dividing fractions, you multiply by the reciprocal of the second fraction:

\[ \frac{1}{3} \div \frac{1}{6} = \frac{1}{3} \times \frac{6}{1} = \frac{6}{3} = 2 \]

So, the ratio \( \frac{1}{3} : \frac{1}{6} \) simplifies to \( 2:1 \).