\(\frac{4}{20} = \frac{1 \cdot 4}{5 \cdot 4} = \frac{1}{5}\)
a) \(\frac{9}{33} = \frac{3 \cdot 3}{11 \cdot 3} = \frac{3}{11}\)
б) \(\frac{6}{14} = \frac{3 \cdot 2}{7 \cdot 2} = \frac{3}{7}\)
в) \(\frac{14}{21} = \frac{2 \cdot 7}{3 \cdot 7} = \frac{2}{3}\)
г) \(\frac{16}{36} = \frac{4 \cdot 4}{9 \cdot 4} = \frac{4}{9}\)
д) \(\frac{21}{27} = \frac{7 \cdot 3}{9 \cdot 3} = \frac{7}{9}\)
е) \(\frac{44}{60} = \frac{11 \cdot 4}{15 \cdot 4} = \frac{11}{15}\)