a: \(\frac{-1}{3}=\frac{-1\cdot8}{3\cdot8}=\frac{-8}{24}\)
\(\frac23=\frac{2\cdot8}{3\cdot8}=\frac{16}{24}\)
\(\frac{-1}{-2}=\frac12=\frac{1\cdot12}{2\cdot12}=\frac{12}{24}\)
\(\frac{6}{-24}=\frac{-6}{24}\)
\(-5=\frac{-5\cdot24}{24}=\frac{-120}{24}\)