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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 813 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.5% of 350 =
  2. 2.10% of 680 =
  3. 3.5% of 50 =
  4. 4.50% of 240 =
  5. 5.25% of 420 =
  6. 6.5% of 760 =
  7. 7.1% of 530 =
  8. 8.50% of 240 =
  9. 9.25% of 20 =
  10. 10.50% of 470 =
  11. 11.25% of 30 =
  12. 12.20% of 50 =
  13. 13.5% of 30 =
  14. 14.15% of 260 =
  15. 15.1% of 640 =
  16. 16.15% of 380 =
  17. 17.5% of 20 =
  18. 18.20% of 160 =
  19. 19.20% of 190 =
  20. 20.10% of 370 =
  21. 21.25% of 890 =
  22. 22.5% of 710 =
  23. 23.25% of 620 =
  24. 24.10% of 770 =
  25. 25.50% of 190 =
  26. 26.15% of 200 =
  27. 27.10% of 140 =
  28. 28.25% of 690 =
  29. 29.10% of 750 =
  30. 30.25% of 530 =
  31. 31.1% of 860 =
  32. 32.25% of 160 =
  33. 33.5% of 190 =
  34. 34.5% of 770 =
  35. 35.1% of 680 =
  36. 36.5% of 270 =
  37. 37.1% of 400 =
  38. 38.1% of 400 =
  39. 39.25% of 350 =
  40. 40.5% of 510 =

Answer key

  1. 17.5
  2. 68
  3. 2.5
  4. 120
  5. 105
  6. 38
  7. 5.3
  8. 120
  9. 5
  10. 235
  11. 7.5
  12. 10
  13. 1.5
  14. 39
  15. 6.4
  16. 57
  17. 1
  18. 32
  19. 38
  20. 37
  21. 222.5
  22. 35.5
  23. 155
  24. 77
  25. 95
  26. 30
  27. 14
  28. 172.5
  29. 75
  30. 132.5
  31. 8.6
  32. 40
  33. 9.5
  34. 38.5
  35. 6.8
  36. 13.5
  37. 4
  38. 4
  39. 87.5
  40. 25.5

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