TalentJR apps
Percentage change is one formula for both increases and decreases. Find the change, divide by the OLD value, multiply by 100, and then say whether it went up or down. The most common mistake is dividing by the new value.
✓ You passed this lesson’s test.
From the old value — “percentage change = change ÷ old value × 100, then say increase or decrease”
Use it for: News about prices and marks, comparing this year with last year, and Class 8–10 comparing-quantities problems.
🧮 Check your own sums with the free Percentage calculator — it shows the working.
Check: 20% of 50 = 10, and 50 − 10 = 40 ✓
▶ 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 🔄 Up-or-Down Umpire 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.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India. Tell us what you need and our team will call you with timings and fees.