Lesson eLearning

A packet of biscuits contains 20 g of fat and 10 g of protein. If the total caloric value of the biscuits is 250 kcal, calculate the approximate percentage of calories derived from fat.

medium 2 marks Class 6 · Science · Components of Food
Answer
72 %

The correct answer is 72 % — Percentage from fat = (180 ÷ 250) × 100 ≈ 72 %.

Step-by-step solution

  1. Calories from fat = 20 g × 9 kcal/g = 180 kcal.
  2. Calories from protein = 10 g × 4 kcal/g = 40 kcal.
  3. Total calories = 250 kcal (given).
  4. Percentage from fat = (180 ÷ 250) × 100 ≈ 72 %.
Common mistake: Using 4 kcal/g for fat

Concept tested: Energy contribution of macronutrients

Published · How this solution was prepared and checked

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