8 2/7 - 3 4/7 =

Convert the mixed numbers to improper fractions:

\( 8 \frac{2}{7} = \frac{(8 \times 7) + 2}{7} = \frac{56 + 2}{7} = \frac{58}{7} \)

\( 3 \frac{4}{7} = \frac{(3 \times 7) + 4}{7} = \frac{21 + 4}{7} = \frac{25}{7} \)

Subtract the improper fractions:

\( \frac{58}{7} - \frac{25}{7} = \frac{58 - 25}{7} = \frac{33}{7} \)

Convert the result back to a mixed number:

\( \frac{33}{7} = 4 \frac{5}{7} \)

Ответ: 4 5/7