Final answer:
To find the percentage of yearbooks the student council has not sold, subtract the number of yearbooks sold from the total number of yearbooks and divide by the total number of yearbooks. In this case, the student council has not sold 12% of the yearbooks. Therefore, the correct option is D. 12%
Step-by-step explanation:
To determine the percentage of yearbooks the student council has not sold, we need to subtract the number of yearbooks sold from the total number of yearbooks and then divide that by the total number of yearbooks. In this case, the student council started with 300 yearbooks and has sold 264 yearbooks, so the number of yearbooks not sold is 300 - 264 = 36. To find the percentage, we divide 36 by 300 and multiply by 100:
Percentage not sold = (36 / 300) * 100 = 0.12 * 100 = 12%
Therefore, the correct answer is D. 12%.