To simplify the expression (2,5+2/3)-1/5, we need to follow the order of operations (PEMDAS/BODMAS).

First, we need to simplify the addition inside the parentheses:
2,5 + 2/3 = 2,5 + 0,6667 = 3,1667

Now, we can substitute this value back into the expression:
(3,1667) - 1/5

Next, we need to find a common denominator for the subtraction:
1/5 = 0,2

Now, we can subtract the two values:
3,1667 - 0,2 = 2,9667

Therefore, the simplified expression is 2,9667.