TalentJR apps
Percentages compare a part with 100. A shopkeeper makes a profit when the selling price is more than the cost price, and a loss when it is less; profit or loss per cent is worked out on the cost price. Simple interest is the extra money paid for borrowing: SI = principal × rate × time ÷ 100, and the amount = principal + interest.
✓ You passed this lesson’s test.
Out of 100 — “per cent means per hundred; profit and loss per cent are always on the cost price”
Use it for: Shopping sales, a shopkeeper’s accounts, bank savings and loans, and the comparing quantities chapter of Class 7 maths.
🧮 Check your own sums with the free Simple interest calculator — it shows the working.
Check: 8% of 5000 = 400 a year, and 400 × 3 = 1200 ✓
▶ 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 sums. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 💰 Profit Planner badge when you pass — and a certificate when you finish all 8 lessons of Part 7 · Class 7. 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 and visit homes in selected cities. Tell us what you need and our team will call you with timings and fees.