What is the percentage of calories from fat for a piece of pie that contains 300 calories and 12 grams of fat?

Percentage of calories = ?

Fat = 12 grams

Total calories = 300

1 gram fat = 9 calories

to calculate calories convert gram into calories and then divide by total calories.

No. of calories = (12 x 9) / (300) = 0.36

So, percentage of calories = 0.36 x 100 = 36%