To solve this subtraction problem, we first need to convert all the mixed numbers to improper fractions.

2 3/16 = (2 * 16 + 3) / 16 = 35 / 16

7 11/16 = (7 * 16 + 11) / 16 = 123 / 16

8 5/16 = (8 * 16 + 5) / 16 = 133 / 16

Now, we can substitute these values back into the equation:

35 / 16 + 123 / 16 - 133 / 16

Adding the numerators together and keeping the denominator the same:

(35 + 123 - 133) / 16 = 25 / 16

Therefore, 2 3/16 + 7 11/16 - 8 5/16 = 1 9/16 or 25/16.