To calculate the perimeters of the smaller and larger squares, we use the formula for the perimeter of a square, which is:
\[ \text{Perimeter} = 4 \times \text{side length} \]
Step 1: Calculate the perimeter of the smaller square.
For the smaller square with a side length of 3 centimeters:
\[ \text{Perimeter}_{\text{small}} = 4 \times 3 = 12 \text{ cm} \]
Step 2: Calculate the perimeter of the larger square.
For the larger square with a side length of 24 centimeters:
\[ \text{Perimeter}_{\text{large}} = 4 \times 24 = 96 \text{ cm} \]
Step 3: Calculate the ratio of the perimeters of the smaller square to the larger square.
The ratio of the perimeter of the smaller square to the larger square is:
\[ \text{Ratio} = \frac{\text{Perimeter}{\text{small}}}{\text{Perimeter}{\text{large}}} = \frac{12}{96} \]
Step 4: Simplify the ratio.
To simplify \(\frac{12}{96}\):
\[ \frac{12 \div 12}{96 \div 12} = \frac{1}{8} \]
Thus, the ratio of the perimeters of the smaller square to the larger square is:
\[ \boxed{\frac{1}{8}} \]