1. Problem: Add 2' 4-15/16" and 6' 8-5/8". 2. Convert mixed fractions to improper fractions for easier addition: $$4-\frac{15}{16} = \frac{64}{16} - \frac{15}{16} = \frac{49}{16}$$ $$8-\frac{5}{8} = \frac{64}{8} - \frac{5}{8} = \frac{59}{8}$$ 3. Find common denominator for inches fractions (16): $$\frac{59}{8} = \frac{118}{16}$$ 4. Add inches: $$\frac{49}{16} + \frac{118}{16} = \frac{167}{16} = 10 + \frac{7}{16}$$ (since $167 \div 16 = 10$ remainder $7$) 5. Add feet: $$2 + 6 = 8$$ 6. Combine feet and inches: $$8' + 10" + \frac{7}{16}" = 8' + 10' + \frac{7}{16}" = 18' \frac{7}{16}"$$ Final answer: 18' 7/16"