If 1 serving of fat contains 3 g, how many calories of fat does it provide?

To determine the caloric content of fat from a serving containing 3 grams, it is essential to know that each gram of fat provides approximately 9 calories. Therefore, if you have 3 grams of fat, you can calculate the total caloric contribution by multiplying the grams of fat by the calories per gram.

Calculating this yields:

3 grams of fat × 9 calories/gram = 27 calories.

This means that a serving containing 3 grams of fat provides a total of 27 calories. Thus, the correct answer reflects this calculation.