1/2 :1/3

To simplify the ratio \( \frac{1}{2} : \frac{1}{3} \), you can convert it into a fraction:

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

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