Помогите решить пример срочно :
(1/6+3/14) : ( 5/21-1/14)

[tex](\frac{1}{6}+\frac{3}{14}):(\frac{5}{21}-\frac{1}{14})=(\frac{7}{42}+\frac{9}{42}):(\frac{10}{42}-\frac{3}{42})=\frac{16}{42}:\frac{7}{42}=\frac{16*42}{42*7}=\frac{16}{7}=\\=2\frac{2}{7}[/tex]

1/6+3/14=7/42+9/42=8/21
5/21-1/14=20/84-6/84=1/6
8/21/1/6=8/21*6/1=16/7=2целых 2/7