## Elementary Technical Mathematics

$5\dfrac{25}{27}$
Convert each mixed number to an improper fraction to obtain: $=\dfrac{21}{8} \times \dfrac{9(1)+7}{9} \\=\dfrac{10}{3}\times \dfrac{16}{9}$ Multiply the numerators together and the denominators together to obtain: $\require{cancel} \\=\dfrac{10(16)}{3(9)} \\=\dfrac{160}{27} \\=5\dfrac{25}{27}$