Rút gọn phân số: 12/-24; -39/75; 132/-264

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\(\frac{12}{-24}=\frac{12:12}{-24:12}=\frac{1}{-2}=-\frac{1}{2}\)

\(\frac{-39}{75}=\frac{-39:3}{75:3}=\frac{-13}{25}\)

\(\frac{132}{-264}=\frac{132:132}{-264:132}=\frac{1}{-2}=-\frac{1}{2}\)

12/-24 = -1/2

-39/75 = -13/25

132/-264 = -1/2