38) $\frac{4}{7}-\frac{4}{21}$; $\frac{40}{100}-\frac{1}{5}$

Question

Вопрос: $Фото задания: 38) $\frac{4}{7}-\frac{4}{21}$; $\frac{40}{100}-\frac{1}{5}$$ Фото задания

Accepted Answer

$\frac{4}{7}-\frac{4}{21}=\frac{12}{21}-\frac{4}{21}=\frac{8}{21}$.

$\frac{40}{100}-\frac{1}{5}=\frac{2}{5}-\frac{1}{5}=\frac{1}{5}$.

Ответ: $\frac{8}{21};\ \frac{1}{5}$.

38) \(\frac{4}{7}-\frac{4}{21}\); \(\frac{40}{100}-\frac{1}{5}\)