\(\dfrac{12}{-24}=\dfrac{-1}{2};\dfrac{-39}{75}=\dfrac{-13}{25};\dfrac{132}{-264}=\dfrac{-1}{2}.\)
\(\dfrac{12}{-24}=\dfrac{-12}{24}=\dfrac{-12:12}{24:12}=\dfrac{-1}{2}\\ \dfrac{-39}{75}=\dfrac{-39:3}{75:3}=\dfrac{-13}{25}\\ \)
\(\dfrac{12}{-24}=\dfrac{-1}{2}\)
\(\dfrac{-39}{75}=\dfrac{-13}{25}\)
\(\dfrac{132}{-264}=\dfrac{-1}{2}\)
\(\dfrac{12}{-24}=\dfrac{12\div12}{-24\div12}=\dfrac{1}{-2}\)
\(\dfrac{-39}{75}=\dfrac{-39\div3}{75\div3}=\dfrac{-13}{25}\)
\(\dfrac{132}{-264}=\dfrac{132\div132}{-264\div132}=\dfrac{-1}{2}\)
\(\dfrac{12}{-24}\) = \(\dfrac{-12}{24}\) = \(\dfrac{-12:12}{24:12}\) = \(\dfrac{-1}{2}\)
\(\dfrac{-39}{75}\) = \(\dfrac{-39:3}{75:3}\) = \(\dfrac{-3}{25}\)
\(\dfrac{132}{-264}\) = \(\dfrac{-132}{264}\) = \(\dfrac{-132:132}{264:132}\) = \(\dfrac{-1}{2}\)