Final answer:
The percentage of kilocalories from fat is 81%.
Step-by-step explanation:
To find the percentage of kilocalories from fat, we need to compare the amount of kilocalories from fat to the total kilocalories consumed. Let's assume the total kilocalories consumed is 100. If 81% of the kilocalories is from fat, then the amount of kilocalories from fat is 81. To find the percentage, we divide the amount of kilocalories from fat by the total kilocalories and multiply by 100:
(81 / 100) * 100 = 81%
Therefore, the correct answer is a. 81%.