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Percentage lesson 9: Find the whole from a percent · Set 208 · 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. 1.15% of a number is 21. What is the number?
  2. 2.Kabir spent ₹15, which is 12% of the pocket money. How much pocket money did Kabir have, in rupees?
  3. 3.Aarav spent ₹45, which is 30% of the pocket money. How much pocket money did Aarav have, in rupees?
  4. 4.Arjun spent ₹82, which is 50% of the pocket money. How much pocket money did Arjun have, in rupees?
  5. 5.4 is 5% of ?
  6. 6.Dev spent ₹112, which is 80% of the pocket money. How much pocket money did Dev have, in rupees?
  7. 7.75% of a number is 162. What is the number?
  8. 8.6 is 5% of ?
  9. 9.Ishaan spent ₹24, which is 60% of the pocket money. How much pocket money did Ishaan have, in rupees?
  10. 10.20% of a number is 5. What is the number?
  11. 11.Diya spent ₹32, which is 80% of the pocket money. How much pocket money did Diya have, in rupees?
  12. 12.75% of a number is 132. What is the number?
  13. 13.Diya spent ₹3, which is 12% of the pocket money. How much pocket money did Diya have, in rupees?
  14. 14.80% of a number is 52. What is the number?
  15. 15.20% of a number is 36. What is the number?
  16. 16.Ishaan spent ₹91, which is 25% of the pocket money. How much pocket money did Ishaan have, in rupees?
  17. 17.50% of a number is 78. What is the number?
  18. 18.248 is 80% of ?
  19. 19.Aarav spent ₹64, which is 25% of the pocket money. How much pocket money did Aarav have, in rupees?
  20. 20.51 is 30% of ?
  21. 21.15% of a number is 15. What is the number?
  22. 22.30% of a number is 81. What is the number?
  23. 23.Diya spent ₹8, which is 10% of the pocket money. How much pocket money did Diya have, in rupees?
  24. 24.Ishaan spent ₹60, which is 15% of the pocket money. How much pocket money did Ishaan have, in rupees?
  25. 25.8 is 5% of ?
  26. 26.57 is 50% of ?
  27. 27.21 is 15% of ?
  28. 28.26 is 10% of ?
  29. 29.Rohan spent ₹24, which is 30% of the pocket money. How much pocket money did Rohan have, in rupees?
  30. 30.66 is 30% of ?
  31. 31.33 is 20% of ?
  32. 32.80% of a number is 220. What is the number?
  33. 33.75% of a number is 171. What is the number?
  34. 34.Sara spent ₹90, which is 40% of the pocket money. How much pocket money did Sara have, in rupees?
  35. 35.75% of a number is 270. What is the number?
  36. 36.Riya spent ₹6, which is 30% of the pocket money. How much pocket money did Riya have, in rupees?
  37. 37.50% of a number is 169. What is the number?
  38. 38.Isha spent ₹39, which is 20% of the pocket money. How much pocket money did Isha have, in rupees?
  39. 39.9 is 30% of ?
  40. 40.Arjun spent ₹9, which is 30% of the pocket money. How much pocket money did Arjun have, in rupees?

Answer key

  1. 140
  2. 125
  3. 150
  4. 164
  5. 80
  6. 140
  7. 216
  8. 120
  9. 40
  10. 25
  11. 40
  12. 176
  13. 25
  14. 65
  15. 180
  16. 364
  17. 156
  18. 310
  19. 256
  20. 170
  21. 100
  22. 270
  23. 80
  24. 400
  25. 160
  26. 114
  27. 140
  28. 260
  29. 80
  30. 220
  31. 165
  32. 275
  33. 228
  34. 225
  35. 360
  36. 20
  37. 338
  38. 195
  39. 30
  40. 30

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