To subtract \( \frac{1}{2} \) from \( \frac{4}{5} \), you need a common denominator. The least common multiple of 5 and 2 is 10.
Now, convert both fractions:
\[ \frac{4}{5} = \frac{4 \times 2}{5 \times 2} = \frac{8}{10} \]
\[ \frac{1}{2} = \frac{1 \times 5}{2 \times 5} = \frac{5}{10} \]
Now you can subtract the two fractions:
\[ \frac{8}{10} - \frac{5}{10} = \frac{8 - 5}{10} = \frac{3}{10} \]
So, \( \frac{4}{5} - \frac{1}{2} = \frac{3}{10} \).