How to Calculate Percentage Change

Learn how to calculate percentage change using the formula: percentage change = (change ÷ original) × 100. Let’s get started! 🚀

How to Calculate Percentage Change - introduction visual

Video Lesson

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Flashcards

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Formula for calculating percentage change using change divided by original value times 100, with notes on increase and decrease.Percentage change examples showing a 30% price increase for a board game and a 25% price decrease for a clock.Percentage decrease calculation where a table bought for $1200 and sold for $960 shows a 20% drop over 3 years.Percentage change example showing a 5% decrease in cinema visitors from Week 2 (1500) to Week 4 (1425) using the change formula.

🛎️ How to Calculate Percentage Change?

  • Percentage change is found by dividing the change by the original value and multiplying by 100.
  • The change is the new value minus the original value.

🛎️ Percentage Change Examples

  • If the final answer is positive, it is a percentage increase.
  • If the final answer is negative, it is a percentage decrease.

🛎️ Practising Percentage Decrease

  • A percentage decrease happens when the new value is smaller than the original value.
  • The percentage shows how much the value has decreased from the start.

🛎️ Applying Percentage Change to Data

  • Always identify the new value and original value first before calculating.
  • Exam tip: always divide by the original value, not the new one.

Practice Questions

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