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Percentage lesson 9: Find the whole from a percent · Set 51 · 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. 1.75% of a number is 99. What is the number?
  2. 2.Sara spent ₹90, which is 30% of the pocket money. How much pocket money did Sara have, in rupees?
  3. 3.Diya spent ₹14, which is 5% of the pocket money. How much pocket money did Diya have, in rupees?
  4. 4.Arjun spent ₹195, which is 75% of the pocket money. How much pocket money did Arjun have, in rupees?
  5. 5.21 is 30% of ?
  6. 6.30% of a number is 69. What is the number?
  7. 7.5% of a number is 20. What is the number?
  8. 8.51 is 50% of ?
  9. 9.18 is 50% of ?
  10. 10.9 is 10% of ?
  11. 11.20% of a number is 15. What is the number?
  12. 12.30% of a number is 15. What is the number?
  13. 13.8 is 25% of ?
  14. 14.103 is 50% of ?
  15. 15.75% of a number is 243. What is the number?
  16. 16.Dev spent ₹53, which is 25% of the pocket money. How much pocket money did Dev have, in rupees?
  17. 17.60 is 30% of ?
  18. 18.7 is 10% of ?
  19. 19.15% of a number is 21. What is the number?
  20. 20.80% of a number is 100. What is the number?
  21. 21.60% of a number is 165. What is the number?
  22. 22.33 is 12% of ?
  23. 23.4 is 5% of ?
  24. 24.12% of a number is 12. What is the number?
  25. 25.80% of a number is 232. What is the number?
  26. 26.Dev spent ₹54, which is 60% of the pocket money. How much pocket money did Dev have, in rupees?
  27. 27.Isha spent ₹30, which is 12% of the pocket money. How much pocket money did Isha have, in rupees?
  28. 28.Ishaan spent ₹18, which is 15% of the pocket money. How much pocket money did Ishaan have, in rupees?
  29. 29.213 is 75% of ?
  30. 30.96 is 80% of ?
  31. 31.40% of a number is 72. What is the number?
  32. 32.304 is 80% of ?
  33. 33.159 is 60% of ?
  34. 34.Arjun spent ₹45, which is 20% of the pocket money. How much pocket money did Arjun have, in rupees?
  35. 35.48 is 12% of ?
  36. 36.Ishaan spent ₹111, which is 75% of the pocket money. How much pocket money did Ishaan have, in rupees?
  37. 37.15 is 10% of ?
  38. 38.37 is 50% of ?
  39. 39.27 is 12% of ?
  40. 40.Diya spent ₹27, which is 25% of the pocket money. How much pocket money did Diya have, in rupees?

Answer key

  1. 132
  2. 300
  3. 280
  4. 260
  5. 70
  6. 230
  7. 400
  8. 102
  9. 36
  10. 90
  11. 75
  12. 50
  13. 32
  14. 206
  15. 324
  16. 212
  17. 200
  18. 70
  19. 140
  20. 125
  21. 275
  22. 275
  23. 80
  24. 100
  25. 290
  26. 90
  27. 250
  28. 120
  29. 284
  30. 120
  31. 180
  32. 380
  33. 265
  34. 225
  35. 400
  36. 148
  37. 150
  38. 74
  39. 225
  40. 108

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