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Percentage lesson 9: Find the whole from a percent · Set 507 · 40 questions
TalentJR

How to work it out (Back to 100%): Write what you know: p% is a. The whole (100%) = a × 100 ÷ p. Check: p% of your answer must give a back.

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  1. 1.50% of a number is 50. What is the number?
  2. 2.Ishaan spent ₹16, which is 10% of the pocket money. How much pocket money did Ishaan have, in rupees?
  3. 3.3 is 12% of ?
  4. 4.60% of a number is 162. What is the number?
  5. 5.40% of a number is 88. What is the number?
  6. 6.Kabir spent ₹17, which is 10% of the pocket money. How much pocket money did Kabir have, in rupees?
  7. 7.80% of a number is 284. What is the number?
  8. 8.75% of a number is 18. What is the number?
  9. 9.194 is 50% of ?
  10. 10.162 is 60% of ?
  11. 11.Sara spent ₹30, which is 30% of the pocket money. How much pocket money did Sara have, in rupees?
  12. 12.Aarav spent ₹59, which is 20% of the pocket money. How much pocket money did Aarav have, in rupees?
  13. 13.5% of a number is 17. What is the number?
  14. 14.Dev spent ₹18, which is 25% of the pocket money. How much pocket money did Dev have, in rupees?
  15. 15.Aarav spent ₹24, which is 40% of the pocket money. How much pocket money did Aarav have, in rupees?
  16. 16.23 is 50% of ?
  17. 17.10% of a number is 2. What is the number?
  18. 18.5% of a number is 11. What is the number?
  19. 19.Aarav spent ₹8, which is 25% of the pocket money. How much pocket money did Aarav have, in rupees?
  20. 20.Rohan spent ₹24, which is 30% of the pocket money. How much pocket money did Rohan have, in rupees?
  21. 21.Kabir spent ₹9, which is 75% of the pocket money. How much pocket money did Kabir have, in rupees?
  22. 22.Kabir spent ₹64, which is 20% of the pocket money. How much pocket money did Kabir have, in rupees?
  23. 23.12% of a number is 36. What is the number?
  24. 24.Sara spent ₹55, which is 50% of the pocket money. How much pocket money did Sara have, in rupees?
  25. 25.85 is 25% of ?
  26. 26.Arjun spent ₹12, which is 30% of the pocket money. How much pocket money did Arjun have, in rupees?
  27. 27.9 is 50% of ?
  28. 28.50% of a number is 24. What is the number?
  29. 29.27 is 20% of ?
  30. 30.75% of a number is 63. What is the number?
  31. 31.Isha spent ₹9, which is 12% of the pocket money. How much pocket money did Isha have, in rupees?
  32. 32.50% of a number is 13. What is the number?
  33. 33.50% of a number is 197. What is the number?
  34. 34.Anaya spent ₹67, which is 50% of the pocket money. How much pocket money did Anaya have, in rupees?
  35. 35.116 is 80% of ?
  36. 36.Diya spent ₹42, which is 12% of the pocket money. How much pocket money did Diya have, in rupees?
  37. 37.40% of a number is 38. What is the number?
  38. 38.56 is 40% of ?
  39. 39.Anaya spent ₹95, which is 50% of the pocket money. How much pocket money did Anaya have, in rupees?
  40. 40.75% of a number is 177. What is the number?

Answer key

  1. 100
  2. 160
  3. 25
  4. 270
  5. 220
  6. 170
  7. 355
  8. 24
  9. 388
  10. 270
  11. 100
  12. 295
  13. 340
  14. 72
  15. 60
  16. 46
  17. 20
  18. 220
  19. 32
  20. 80
  21. 12
  22. 320
  23. 300
  24. 110
  25. 340
  26. 40
  27. 18
  28. 48
  29. 135
  30. 84
  31. 75
  32. 26
  33. 394
  34. 134
  35. 145
  36. 350
  37. 95
  38. 140
  39. 190
  40. 236

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