To solve and simplify \( \frac{8}{10} - \frac{7}{10} \):
Since the fractions have the same denominator, you can directly subtract the numerators:
\[ \frac{8 - 7}{10} = \frac{1}{10} \]
So, \( \frac{8}{10} - \frac{7}{10} = \frac{1}{10} \).
The fraction \( \frac{1}{10} \) is already in its simplest form.