Simplify inside the bracket

First, evaluate $3/4 \div 0.25$. Since $0.25 = 1/4$, the division is $3/4 \div 1/4 = (3/4) \times (4/1) = 3$. Now add $1/2$ to this result.

$3 + \frac{1}{2} = \frac{6}{2} + \frac{1}{2} = \frac{7}{2}$

Evaluate the 'of' operation

Multiply the result by $2/5$ as indicated by 'of'.

$\frac{2}{5} \times \frac{7}{2} = \frac{7}{5}$

Perform the final subtraction

Subtract $1/3$ from the result obtained in the previous step.

$\frac{7}{5} - \frac{1}{3} = \frac{21}{15} - \frac{5}{15} = \frac{16}{15}$