Question

2 целых 1/7:b=2 целых 19/28:3 целых 3/4

Answer 1

$2 frac{1}{7} :b=2 frac{19}{28}: frac{3}{4}$
$frac{15}{7} :b= frac{75}{28}*frac{4}{3}$
$frac{15}{7} :b= frac{25}{7}$
$b= frac{15}{7} :frac{25}{7}$
$b= frac{15}{7} *frac{7}{25}$
$b= frac{3}{1} *frac{1}{5}$
$b= frac{3}{5}$