$=\frac{19}{8}\cdot \frac{24}{7}$
Apply the fraction rule $\frac{a}{b}\cdot \frac{c}{d}=\frac{a\:\cdot \:c}{b\:\cdot \:d}$$=\frac{19\cdot 24}{8\cdot 7}$
Factor the number: $ 24=8\cdot 3$$=\frac{19\cdot 8\cdot 3}{8\cdot 7}$
Cancel the common factor: $ 8$$=\frac{19\cdot 3}{7}$
Multiply the numbers: $ 19\cdot 3=57$$=\frac{57}{7}$
Convert mixed numbers to improper fractions $:{\quad}2\frac{3}{8}=\frac{19}{8}$$=\frac{19}{8}\cdot 3\frac{3}{7}$ $=8\frac{1}{7}$