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Step-by-step explanation:
[tex] \frac{1}{4} - \frac{1}{12} \\ [/tex]
[tex] \frac{1 \times 3}{4 \times 3} - \frac{1}{12} \\ [/tex]
[tex] \frac{3}{12} - \frac{1}{12} \\ [/tex]
[tex] \frac{3 - 1}{12} \\ [/tex]
[tex] \frac{2}{12} = \frac{1}{6} \\ [/tex]