Rút gọn phân số: 9/36

1/4

\(\frac{9}{36}=\frac{9:9}{36:9}=\frac{1}{4}\)

\(\frac{30}{48}=\frac{30:6}{48:6}=\frac{5}{8}\)

\(\frac{72}{42}=\frac{72:6}{42:6}=\frac{12}{7}\)

\(\frac{8\times12\times17}{19\times12\times8}=\frac{17}{19}\)

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