\(\text{a)}\dfrac{2}{4}=\dfrac{1}{2}\)
\(\text{b)}\dfrac{20}{40}=\dfrac{1}{2}\)
\(\text{c)}\dfrac{-3}{15}=\dfrac{-1}{5}\)
\(\text{d)}\dfrac{-5}{-10}=\dfrac{1}{2}\)
\(\text{e)}\dfrac{75}{300}=\dfrac{1}{4}\)
\(\text{f)}\dfrac{-10}{-15}=\dfrac{2}{3}\)
\(\text{g)}\dfrac{-36}{-24}=\dfrac{3}{2}\)
\(\text{h)}\dfrac{15}{-27}=\dfrac{-5}{9}\)