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Percentage change has an old and a new value. But when you compare two things side by side — two shops, two players — neither one is “old”. Then use percentage difference: divide the difference by the average of the two numbers.
✓ You passed this lesson’s test.
Use the average — “when neither number comes first, divide the difference by their average”
Use it for: Comparing prices in two shops, two players’ scores, or two readings in a science experiment.
🧮 Check your own sums with the free Percentage calculator — it shows the working.
Check: 40% of the average 50 is 20, which is the difference ✓
▶ Watch it animatedWork it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the ⚖️ Balance Judge badge when you pass — and a certificate when you finish all 5 lessons of Part 3 · Percentage change. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
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