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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 612 · 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 260 =
  2. 2.25% of 200 =
  3. 3.15% of 440 =
  4. 4.1% of 770 =
  5. 5.25% of 820 =
  6. 6.20% of 190 =
  7. 7.25% of 30 =
  8. 8.1% of 620 =
  9. 9.20% of 840 =
  10. 10.5% of 820 =
  11. 11.5% of 760 =
  12. 12.25% of 230 =
  13. 13.20% of 370 =
  14. 14.15% of 310 =
  15. 15.15% of 40 =
  16. 16.20% of 430 =
  17. 17.50% of 710 =
  18. 18.25% of 610 =
  19. 19.1% of 780 =
  20. 20.50% of 820 =
  21. 21.20% of 610 =
  22. 22.20% of 830 =
  23. 23.15% of 140 =
  24. 24.20% of 680 =
  25. 25.50% of 200 =
  26. 26.50% of 830 =
  27. 27.20% of 630 =
  28. 28.10% of 310 =
  29. 29.5% of 50 =
  30. 30.10% of 810 =
  31. 31.50% of 800 =
  32. 32.25% of 600 =
  33. 33.5% of 330 =
  34. 34.15% of 880 =
  35. 35.1% of 270 =
  36. 36.1% of 670 =
  37. 37.1% of 350 =
  38. 38.20% of 370 =
  39. 39.10% of 90 =
  40. 40.5% of 270 =

Answer key

  1. 65
  2. 50
  3. 66
  4. 7.7
  5. 205
  6. 38
  7. 7.5
  8. 6.2
  9. 168
  10. 41
  11. 38
  12. 57.5
  13. 74
  14. 46.5
  15. 6
  16. 86
  17. 355
  18. 152.5
  19. 7.8
  20. 410
  21. 122
  22. 166
  23. 21
  24. 136
  25. 100
  26. 415
  27. 126
  28. 31
  29. 2.5
  30. 81
  31. 400
  32. 150
  33. 16.5
  34. 132
  35. 2.7
  36. 6.7
  37. 3.5
  38. 74
  39. 9
  40. 13.5

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