15 150 2 / 20 200 3 =

\( \frac{15}{20} : \frac{150}{200} : \frac{2}{3} = \frac{15}{20} \times \frac{200}{150} \times \frac{3}{2} = \frac{15 \times 200 \times 3}{20 \times 150 \times 2} = \frac{9000}{6000} = \frac{3}{2} \)

Ответ: \( \frac{3}{2} \)