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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 70 · 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. 1.10% of 730 =
  2. 2.20% of 40 =
  3. 3.25% of 400 =
  4. 4.25% of 370 =
  5. 5.5% of 290 =
  6. 6.5% of 530 =
  7. 7.15% of 730 =
  8. 8.15% of 290 =
  9. 9.15% of 690 =
  10. 10.5% of 870 =
  11. 11.20% of 20 =
  12. 12.10% of 80 =
  13. 13.25% of 660 =
  14. 14.10% of 730 =
  15. 15.50% of 750 =
  16. 16.50% of 430 =
  17. 17.10% of 40 =
  18. 18.20% of 770 =
  19. 19.1% of 870 =
  20. 20.50% of 350 =
  21. 21.10% of 760 =
  22. 22.25% of 250 =
  23. 23.5% of 860 =
  24. 24.1% of 300 =
  25. 25.20% of 430 =
  26. 26.1% of 300 =
  27. 27.20% of 40 =
  28. 28.10% of 730 =
  29. 29.50% of 380 =
  30. 30.50% of 90 =
  31. 31.10% of 530 =
  32. 32.25% of 900 =
  33. 33.25% of 100 =
  34. 34.50% of 820 =
  35. 35.10% of 270 =
  36. 36.5% of 330 =
  37. 37.20% of 790 =
  38. 38.5% of 180 =
  39. 39.50% of 590 =
  40. 40.1% of 400 =

Answer key

  1. 73
  2. 8
  3. 100
  4. 92.5
  5. 14.5
  6. 26.5
  7. 109.5
  8. 43.5
  9. 103.5
  10. 43.5
  11. 4
  12. 8
  13. 165
  14. 73
  15. 375
  16. 215
  17. 4
  18. 154
  19. 8.7
  20. 175
  21. 76
  22. 62.5
  23. 43
  24. 3
  25. 86
  26. 3
  27. 8
  28. 73
  29. 190
  30. 45
  31. 53
  32. 225
  33. 25
  34. 410
  35. 27
  36. 16.5
  37. 158
  38. 9
  39. 295
  40. 4

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