5 15 / 23 46 =

\( \frac{5}{23} : \frac{15}{46} = \frac{5}{23} \times \frac{46}{15} = \frac{5 \times 46}{23 \times 15} = \frac{230}{345} = \frac{2}{3} \)

Ответ: \( \frac{2}{3} \)