This article is from the Fat-free Diet FAQ, by artemis@rahul.net (Michelle Dick) with numerous contributions by others.
One useful measure of fat is the percentage of calories as fat. To
compute this percentage you need to know both the total calories
and grams of fat:
grams of fat X 9
%CFF = ---------------- X 100
total calories
2 * 9 18
----- * 100 = ---- * 100 = .30 * 100 = 30% calories from fat
60 60
 
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