7) 26/15 · 15/30 и 9/15 · 10/30

\(\frac{26}{15}\cdot\frac{15}{30}=\frac{26}{30}=\frac{13}{15}\).

\(\frac{9}{15}\cdot\frac{10}{30}=\frac{90}{450}=\frac{1}{5}\).

Ответ: \(\frac{26}{15}\cdot\frac{15}{30} > \frac{9}{15}\cdot\frac{10}{30}\).