Ответ:
- \(\frac{9}{27}=\frac{9:9}{27:9}=\frac{1}{3}\).
- \(\frac{40}{280}=\frac{40:40}{280:40}=\frac{1}{7}\).
- \(\frac{36\cdot15}{3\cdot18}=\frac{36:3\cdot15}{18}=\frac{2\cdot15}{18}=\frac{30}{18}=\frac{5}{3}\).
Ответ: а) \(\frac{1}{3}\); б) \(\frac{1}{7}\); в) \(\frac{5}{3}\).
