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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 179 · 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. 1.20% of 110 =
  2. 2.15% of 540 =
  3. 3.10% of 660 =
  4. 4.10% of 390 =
  5. 5.5% of 170 =
  6. 6.1% of 80 =
  7. 7.25% of 420 =
  8. 8.15% of 760 =
  9. 9.10% of 580 =
  10. 10.50% of 630 =
  11. 11.1% of 890 =
  12. 12.50% of 830 =
  13. 13.50% of 450 =
  14. 14.10% of 500 =
  15. 15.15% of 140 =
  16. 16.10% of 200 =
  17. 17.5% of 820 =
  18. 18.5% of 190 =
  19. 19.50% of 430 =
  20. 20.25% of 330 =
  21. 21.10% of 610 =
  22. 22.20% of 420 =
  23. 23.1% of 840 =
  24. 24.10% of 60 =
  25. 25.5% of 370 =
  26. 26.10% of 330 =
  27. 27.15% of 60 =
  28. 28.20% of 360 =
  29. 29.10% of 370 =
  30. 30.15% of 870 =
  31. 31.25% of 330 =
  32. 32.50% of 230 =
  33. 33.10% of 320 =
  34. 34.15% of 380 =
  35. 35.25% of 180 =
  36. 36.5% of 690 =
  37. 37.1% of 860 =
  38. 38.5% of 110 =
  39. 39.25% of 40 =
  40. 40.10% of 570 =

Answer key

  1. 22
  2. 81
  3. 66
  4. 39
  5. 8.5
  6. 0.8
  7. 105
  8. 114
  9. 58
  10. 315
  11. 8.9
  12. 415
  13. 225
  14. 50
  15. 21
  16. 20
  17. 41
  18. 9.5
  19. 215
  20. 82.5
  21. 61
  22. 84
  23. 8.4
  24. 6
  25. 18.5
  26. 33
  27. 9
  28. 72
  29. 37
  30. 130.5
  31. 82.5
  32. 115
  33. 32
  34. 57
  35. 45
  36. 34.5
  37. 8.6
  38. 5.5
  39. 10
  40. 57

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