3,15 \times 1,6 = 5,04
4,79 - 5,04 = -0,25
\[ \frac{1}{16} : (-0,25) = \frac{1}{16} : \left(-\frac{1}{4}\right) = \frac{1}{16} \times (-4) = -\frac{4}{16} = -\frac{1}{4} \]
Ответ: -1/4