$\frac{1}{2}-\frac{5}{8}+\frac{3}{4}$

Step 1 ：Given the fractions \(\frac{1}{2}\), \(\frac{5}{8}\), and \(\frac{3}{4}\)

Step 2 ：Find a common denominator for all three fractions, which is the least common multiple of 2, 8, and 4

Step 3 ：Convert each fraction to an equivalent fraction with the common denominator

Step 4 ：Add or subtract the numerators as indicated

Step 5 ：The final result is \(\boxed{\frac{5}{8}}\)