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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 753 · 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. 1.25% of 320 =
  2. 2.15% of 730 =
  3. 3.10% of 830 =
  4. 4.50% of 260 =
  5. 5.1% of 310 =
  6. 6.5% of 870 =
  7. 7.15% of 50 =
  8. 8.20% of 350 =
  9. 9.1% of 230 =
  10. 10.5% of 440 =
  11. 11.15% of 280 =
  12. 12.15% of 760 =
  13. 13.15% of 580 =
  14. 14.25% of 670 =
  15. 15.25% of 200 =
  16. 16.25% of 460 =
  17. 17.10% of 850 =
  18. 18.1% of 440 =
  19. 19.10% of 510 =
  20. 20.5% of 500 =
  21. 21.50% of 60 =
  22. 22.15% of 110 =
  23. 23.1% of 270 =
  24. 24.10% of 840 =
  25. 25.50% of 430 =
  26. 26.10% of 40 =
  27. 27.10% of 270 =
  28. 28.15% of 450 =
  29. 29.20% of 520 =
  30. 30.20% of 770 =
  31. 31.20% of 80 =
  32. 32.5% of 420 =
  33. 33.20% of 110 =
  34. 34.25% of 890 =
  35. 35.10% of 820 =
  36. 36.25% of 260 =
  37. 37.25% of 610 =
  38. 38.25% of 720 =
  39. 39.50% of 50 =
  40. 40.25% of 490 =

Answer key

  1. 80
  2. 109.5
  3. 83
  4. 130
  5. 3.1
  6. 43.5
  7. 7.5
  8. 70
  9. 2.3
  10. 22
  11. 42
  12. 114
  13. 87
  14. 167.5
  15. 50
  16. 115
  17. 85
  18. 4.4
  19. 51
  20. 25
  21. 30
  22. 16.5
  23. 2.7
  24. 84
  25. 215
  26. 4
  27. 27
  28. 67.5
  29. 104
  30. 154
  31. 16
  32. 21
  33. 22
  34. 222.5
  35. 82
  36. 65
  37. 152.5
  38. 180
  39. 25
  40. 122.5

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