Giúp em bài này Em cảm ơn trước

`\frac{4}{12}=\frac{4:4}{12:4}=\frac{1}{3}`

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`\frac{24}{30}=\frac{24:6}{30:6}=\frac{4}{5}`

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`\frac{25}{100}=\frac{25:25}{100:25}=\frac{1}{4}`

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`\frac{60}{80}=\frac{60:20}{80:20}=\frac{3}{4}`

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`\frac{9}{18}=\frac{9:9}{18:9}=\frac{1}{2}`

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`\frac{60}{36}=\frac{60:12}{36:12}=\frac{5}{3}`

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`\frac{72}{54}=\frac{72:18}{54:18}=\frac{4}{3}`

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`\frac{35}{210}=\frac{35:35}{210:35}=\frac{1}{6}`