What would be the percentage of fat calories in a slice of apple pie that contains 10 grams of fat and has 180 total calories?

To find the percentage of fat calories in the slice of Apple pie, first calculate the calories from fat. Since fat has 9 calories per gram, 10 grams of fat would contribute 90 calories (10 grams x 9 calories/gram). Then, divide the calories from fat (90) by the total calories (180) and multiply by 100 to get the percentage. Thus, (90 / 180) x 100 = 50%. Therefore, 50% of the calories in the slice of Apple pie come from fat.