To find the height of Duc's art piece, we can use the formula for the area of a parallelogram, which is:
\[ \text{Area} = \text{Base} \times \text{Height} \]
Given that the area of Duc's art piece is 675 in² and the base is 25 inches, we can rearrange the formula to solve for the height:
\[ \text{Height} = \frac{\text{Area}}{\text{Base}} \]
\[ \text{Height} = \frac{675 \text{ in²}}{25 \text{ in}} \]
\[ \text{Height} = 27 \text{ in} \]
Therefore, the height of Duc's art piece is 27 inches.