TalentJR apps
If a price goes up 10% and then down 10%, is it back where it started? No! The second change is worked out on the new price, which is bigger. Do the changes one at a time — or try a price of ₹100.
✓ You passed this lesson’s test.
One at a time — “do the first change, then work out the second percent on the new value”
Use it for: Prices that change twice, a sale on top of a sale, growth over two years, and Olympiad and Class 8–10 problems.
🧮 Check your own sums with the free Percentage calculator — it shows the working.
Check: 30 + 20 + 30 × 20 ÷ 100 = 56% in all; 56% of 200 = 112, and 200 + 112 = 312 ✓
▶ 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 🪜 Step-by-Step Climber 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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