(3 1/5*0,75)+(1/5:11/5)=

The mixed number $3 \frac{1}{5}$ can be converted to an improper fraction:

$$3 \frac{1}{5} = \frac{(3 \times 5) + 1}{5} = \frac{15 + 1}{5} = \frac{16}{5}$$

The decimal 0.75 (from 0,75) can be converted to a fraction:

$$0.75 = \frac{75}{100} = \frac{3}{4}$$

So the first parenthesis becomes:

$$\left(\frac{16}{5} \times \frac{3}{4}\right)$$

$$\frac{16}{5} \times \frac{3}{4} = \frac{16 \times 3}{5 \times 4} = \frac{48}{20}$$

Simplify the fraction by dividing the numerator and denominator by their greatest common divisor, which is 4:

$$\frac{48}{20} = \frac{12}{5}$$

To divide by a fraction, multiply by its reciprocal:

$$\frac{1}{5} : \frac{11}{5} = \frac{1}{5} \times \frac{5}{11}$$

Now, multiply the fractions:

$$\frac{1}{5} \times \frac{5}{11} = \frac{1 \times 5}{5 \times 11} = \frac{5}{55}$$

Simplify the fraction by dividing the numerator and denominator by their greatest common divisor, which is 5:

$$\frac{5}{55} = \frac{1}{11}$$

We need to add $\frac{12}{5}$ and $\frac{1}{11}$. To add fractions, find a common denominator. The least common multiple of 5 and 11 is $5 \times 11 = 55$.
Convert $\frac{12}{5}$ to a fraction with denominator 55:

$$\frac{12}{5} = \frac{12 \times 11}{5 \times 11} = \frac{132}{55}$$

Convert $\frac{1}{11}$ to a fraction with denominator 55:

$$\frac{1}{11} = \frac{1 \times 5}{11 \times 5} = \frac{5}{55}$$

Now, add the fractions:

$$\frac{132}{55} + \frac{5}{55} = \frac{132 + 5}{55} = \frac{137}{55}$$

The final answer is $\frac{137}{55}$.