5.3,2. 5 = 12

$$5. 3,2 \cdot \frac{5}{12} = \frac{32}{10} \cdot \frac{5}{12} = \frac{32 \cdot 5}{10 \cdot 12} = \frac{160}{120} = \frac{16}{12} = \frac{4}{3} = 1\frac{1}{3}$$

Ответ: $$1\frac{1}{3}$$