\[ 3 \frac{1}{16} - \frac{1}{8} = 3 + \frac{1}{16} - \frac{2}{16} = 3 - \frac{1}{16} = 2 + \frac{16}{16} - \frac{1}{16} = 2 \frac{15}{16} \]
Ответ: 2 15/16