Question

Помогите с примером 2целых4/5*3/7-1/3*2целых4/5

Answer 1

$2\frac{4}{5} *\frac{3}{7} -\frac{1}{3} *2\frac{4}{5} =2\frac{4}{5} *(\frac{3}{7} ^{(3} -\frac{1}{3} ^{(7} )=\frac{14}{5} *(\frac{9}{21} -\frac{7}{21} )=\frac{14}{5} *\frac{2}{21} =\frac{2*2}{5*3} =\frac{4}{15}$