2/3√81-5

To simplify the expression 2/3√81 - 5, we can start by simplifying the square root of 81. The square root of 81 is 9 because 9 * 9 = 81.

So, substituting the value, we get:

2/3 * 9 - 5

Next, we multiply 2/3 by 9:

(2 * 9) / 3 - 5 18/3 - 5

Now, we can simplify the fraction by dividing the numerator by the denominator:

6 - 5 = 1

So, the simplified expression is 1.