To solve the first expression, we add the fractions:

5/8 + 7/8 - 1/8 = (5 + 7 - 1)/8 = 11/8

So, 5/8 + 7/8 - 1/8 = 11/8

Next, we simplify the second expression by subtracting the fractions within the parentheses first:

4/9 - 1/9 = 3/9 = 1/3

Then subtract this result from 5/9:

5/9 - 1/3 = (53 - 19) / (9*3) = (15 - 9) / 27 = 6/27 = 2/9

So, 5/9 - (4/9 - 1/9) = 2/9