Разделим числитель и знаменатель каждой дроби на 3:
- \(\frac{3}{9} = \frac{3:3}{9:3} = \frac{1}{3}\)
- \(\frac{12}{33} = \frac{12:3}{33:3} = \frac{4}{11}\)
- \(\frac{30}{45} = \frac{30:3}{45:3} = \frac{10}{15}\)
- \(\frac{15}{36} = \frac{15:3}{36:3} = \frac{5}{12}\)
- \(\frac{99}{240} = \frac{99:3}{240:3} = \frac{33}{80}\)
Соответствующие равенства:
- \(\frac{3}{9} = \frac{1}{3}\)
- \(\frac{12}{33} = \frac{4}{11}\)
- \(\frac{30}{45} = \frac{10}{15}\)
- \(\frac{15}{36} = \frac{5}{12}\)
- \(\frac{99}{240} = \frac{33}{80}\)
Ответ: \(\frac{3}{9} = \frac{1}{3}\), \(\frac{12}{33} = \frac{4}{11}\), \(\frac{30}{45} = \frac{10}{15}\), \(\frac{15}{36} = \frac{5}{12}\), \(\frac{99}{240} = \frac{33}{80}\)