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Sometimes you know a part and its percent, but not the whole: “20% of a number is 14. What is the number?” Work back from the percent you know to 100%.
✓ You passed this lesson’s test.
Back to 100% — “whole = part × 100 ÷ percent”
Use it for: Finding the full amount of pocket money or a class from a percent, and the Class 8 comparing-quantities chapter.
🧮 Check your own sums with the free Percentage calculator — it shows the working.
Check: 20% of 70 = 70 ÷ 5 = 14 ✓
▶ 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 🔙 Whole Finder badge when you pass — and a certificate when you finish all 4 lessons of Part 2 · Percentage of a number. 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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