8: 4/5

The expression "8: 4/5" seems to indicate a ratio or a division. In this case, it can be interpreted as "8 divided by 4/5."

To divide by a fraction, you can multiply by its reciprocal. So:

\[ 8 \div \frac{4}{5} = 8 \times \frac{5}{4} \]

Calculating that gives:

\[ 8 \times \frac{5}{4} = \frac{8 \times 5}{4} = \frac{40}{4} = 10 \]

So, \( 8: 4/5 \) equals 10. If you have a different context in mind or need further assistance, please provide more details!