It looks like you've listed some fractions in both their word form and numerical form. Here they are represented numerically:
- One-half: \( \frac{1}{2} \)
- One-fourth: \( \frac{1}{4} \)
- One-third: \( \frac{1}{3} \)
- Two-thirds: \( \frac{2}{3} \)
If you need any specific calculations or comparisons involving these fractions, feel free to ask!