Learning objective

Calculate percentage increase and percentage decrease.

Read the explanation, check the common trap, then practise with flashcards and questions.

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Flashcards

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Topic

Statistical skills

Subtopic

Statistical skills

AQA GCSE GeographyGeographical skills

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Understand this objective

Short explanation

Calculating percentage increase and percentage decrease is essential in geography for analyzing changes in data over time. To find the percentage increase, subtract the original value from the new value, divide the result by the original value, and multiply by 100. Conversely, for percentage decrease, subtract the new value from the original value, divide by the original value, and multiply by 100. These calculations help in understanding trends, such as population growth or decline, and provide a clearer picture of geographical changes, enabling better decision-making based on statistical evidence.

Key concepts

percentage increasepercentage decrease

Why it matters

This objective helps connect Statistical skills to exam-style questions, flashcards, and revision notes for Statistical skills.

Common mistakes

1 linked

Confusing absolute change with percentage change: To calculate percentage increase or decrease, first find the absolute change (new value minus old value), then divide that change by the original value, and finally multiply by 100 to express it as a percentage.

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