1. The problem is to express the number of sectors labeled A as a ratio compared to the total number of sectors on the spinner. 2. The spinner is divided into 12 equal sectors with labels A, B, and C arranged around the circle. 3. Count the number of sectors labeled A: From the list, A appears 4 times. 4. The total number of sectors is 12. 5. The ratio of sectors labeled A to total sectors is given by the formula: $$\text{Ratio} = \frac{\text{Number of A sectors}}{\text{Total sectors}}$$ 6. Substitute the values: $$\text{Ratio} = \frac{4}{12}$$ 7. Simplify the fraction by dividing numerator and denominator by their greatest common divisor 4: $$\frac{\cancel{4}}{\cancel{12}} = \frac{1}{3}$$ 8. Therefore, the ratio of sectors labeled A to the total number of sectors is $\frac{1}{3}$.