1. The problem is to evaluate the expression $40,55:5$. 2. The comma in $40,55$ is likely a decimal separator, so the number is $40.55$. 3. The colon $:$ represents division, so the expression means $40.55 \div 5$. 4. Use the division formula: $$\text{Quotient} = \frac{\text{Dividend}}{\text{Divisor}}$$ 5. Substitute the values: $$\frac{40.55}{5}$$ 6. Perform the division: $$40.55 \div 5 = 8.11$$ 7. Therefore, the final answer is $8.11$.