## Elementary Technical Mathematics

$30\frac{5}{6}$
By examination, 12 is the least common denominator. Convert each fraction to have the LCD, then add the whole numbers and the numerators. $16\frac{2}{3}+1\frac{1}{4}+12\frac{11}{12}=$ $16\frac{2\times4}{3\times4}+1\frac{1\times3}{4\times3}+12\frac{11}{12}=$ $16\frac{8}{12}+1\frac{3}{12}+12\frac{11}{12}=$ $29\frac{22}{12}=$ $30\frac{10}{12}=$ $30\frac{10\div2}{12\div2}=$ $30\frac{5}{6}$