15 150 2 20 200 3

\[ \frac{15}{20} \div \frac{150}{200} \div \frac{2}{3} = \frac{15}{20} \cdot \frac{200}{150} \cdot \frac{3}{2} = \frac{15 \cdot 200 \cdot 3}{20 \cdot 150 \cdot 2} = \frac{9000}{6000} = \frac{3}{2} = 1\frac{1}{2} \]

Ответ: \(1\frac{1}{2}\)