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Percentage lesson 9: Find the whole from a percent · Set 814 · 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.

NameDateTime takenScore ___ / 40
  1. 1.20% of a number is 37. What is the number?
  2. 2.40% of a number is 2. What is the number?
  3. 3.5% of a number is 14. What is the number?
  4. 4.Riya spent ₹129, which is 75% of the pocket money. How much pocket money did Riya have, in rupees?
  5. 5.Aarav spent ₹110, which is 50% of the pocket money. How much pocket money did Aarav have, in rupees?
  6. 6.Ishaan spent ₹99, which is 75% of the pocket money. How much pocket money did Ishaan have, in rupees?
  7. 7.30% of a number is 21. What is the number?
  8. 8.132 is 40% of ?
  9. 9.Sara spent ₹9, which is 12% of the pocket money. How much pocket money did Sara have, in rupees?
  10. 10.24 is 12% of ?
  11. 11.17 is 5% of ?
  12. 12.9 is 30% of ?
  13. 13.88 is 80% of ?
  14. 14.8 is 20% of ?
  15. 15.30 is 10% of ?
  16. 16.3 is 12% of ?
  17. 17.15% of a number is 42. What is the number?
  18. 18.24 is 60% of ?
  19. 19.12 is 15% of ?
  20. 20.60% of a number is 81. What is the number?
  21. 21.40% of a number is 18. What is the number?
  22. 22.50% of a number is 17. What is the number?
  23. 23.30% of a number is 51. What is the number?
  24. 24.Sara spent ₹9, which is 60% of the pocket money. How much pocket money did Sara have, in rupees?
  25. 25.28 is 25% of ?
  26. 26.Isha spent ₹183, which is 75% of the pocket money. How much pocket money did Isha have, in rupees?
  27. 27.Riya spent ₹9, which is 50% of the pocket money. How much pocket money did Riya have, in rupees?
  28. 28.40% of a number is 132. What is the number?
  29. 29.12% of a number is 9. What is the number?
  30. 30.Aarav spent ₹30, which is 20% of the pocket money. How much pocket money did Aarav have, in rupees?
  31. 31.41 is 25% of ?
  32. 32.12% of a number is 39. What is the number?
  33. 33.270 is 75% of ?
  34. 34.78 is 20% of ?
  35. 35.15% of a number is 18. What is the number?
  36. 36.36 is 40% of ?
  37. 37.30% of a number is 60. What is the number?
  38. 38.129 is 60% of ?
  39. 39.32 is 10% of ?
  40. 40.12% of a number is 3. What is the number?

Answer key

  1. 185
  2. 5
  3. 280
  4. 172
  5. 220
  6. 132
  7. 70
  8. 330
  9. 75
  10. 200
  11. 340
  12. 30
  13. 110
  14. 40
  15. 300
  16. 25
  17. 280
  18. 40
  19. 80
  20. 135
  21. 45
  22. 34
  23. 170
  24. 15
  25. 112
  26. 244
  27. 18
  28. 330
  29. 75
  30. 150
  31. 164
  32. 325
  33. 360
  34. 390
  35. 120
  36. 90
  37. 200
  38. 215
  39. 320
  40. 25

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