[tex](\frac{2^{-2} \times 3^{-1} }{3^{-2} \times2^{-1} } )^{-1} = \frac{2^2\times3^1}{3^2 \times2^1} = \frac{4 \times 3}{9\times 2} = \frac{12}{18} = \frac{2}{3}[/tex]
odp C
