TalentJR apps
To raise a price by 15% you could find 15% and add it on — two steps. Faster: the new price is 100% + 15% = 115% of the old one, so multiply by 1.15 in one go. A fall of 15% leaves 85%, so multiply by 0.85.
✓ You passed this lesson’s test.
One-step multiplier — “start from 100% and add or take away the change”
Use it for: Price rises and sale prices, salary hikes, population growth, and profit and loss in Class 8–10.
Check: 15% of 360 = 36 + 18 = 54, and 360 + 54 = 414 ✓
Work 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 — and beat the clock: finish within 4 min.
🏅 Sign in with Google to earn the 📈 Growth Guru badge when you pass — and a certificate when you finish all 10 lessons of Part 4 · Speed decimals, fractions and percentages. 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.