Add write your answer in simplest form 15 3/4 + 12 5/8
\(15 \frac{3}{4} + 12\frac{5}{8} = 15+12+ \frac{6}{8} +\frac{5}{8} = 27\frac{11}{8} = \boxed{\bf{28\frac{3}{8} = 28.375}}\)