1 3/5 - 4/5 =

First, convert the mixed number to an improper fraction:

\( 1 \frac{3}{5} = \frac{(1 \times 5) + 3}{5} = \frac{5 + 3}{5} = \frac{8}{5} \)

Now, subtract the fractions:

\( \frac{8}{5} - \frac{4}{5} = \frac{8 - 4}{5} = \frac{4}{5} \)

Ответ: 4/5