7) 2.5 1 3 12

$$7) -1\frac{2}{5} \cdot 3\frac{1}{12} = -\frac{7}{5} \cdot \frac{37}{12} = -\frac{7 \cdot 37}{5 \cdot 12} = -\frac{259}{60} = -4\frac{19}{60}$$

Ответ: -4 19/60