12. Choose the LCD and GCF for the equation below. Simplify. \[ \begin{array}{l} 2 \frac{3}{4}+\left(-4 \frac{1}{5}\right) \\ \text { LCD }= \end{array} \] GCF =

Step 1 ：Find the LCD and GCF for the fractions \(\frac{3}{4}\) and \(\frac{1}{5}\)

Step 2 ：LCD = LCM(4, 5) = 20

Step 3 ：GCF = GCD(3, 1) = 1

Step 4 ：\boxed{\text{The LCD is 20 and the GCF is 1}}