Step-by-step explanation:[tex]to \: subtract \: 79 \frac{4}{7} from \: 83 \frac{3}{7} [/tex][tex]subtract \: the \: whole \: numbers \: first. \: \\ so \: 83 - 79 = 4[/tex][tex]then \: subtract \: the \: fractions. \\ \frac{4}{7} - \frac{3}{7} = \frac{1}{7} [/tex][tex]combine \: these \: results. \\ 4 - \frac{1}{7} = 3 \frac{6}{7} [/tex][tex]so \: 83 \frac{3}{7} - 79 \frac{4}{7} = 3 \frac{6}{7} [/tex]