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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 109 · 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 860 =
  2. 2.5% of 70 =
  3. 3.20% of 400 =
  4. 4.5% of 560 =
  5. 5.1% of 250 =
  6. 6.1% of 240 =
  7. 7.5% of 750 =
  8. 8.20% of 180 =
  9. 9.15% of 880 =
  10. 10.20% of 120 =
  11. 11.15% of 750 =
  12. 12.1% of 710 =
  13. 13.5% of 770 =
  14. 14.5% of 120 =
  15. 15.20% of 310 =
  16. 16.20% of 360 =
  17. 17.50% of 140 =
  18. 18.5% of 880 =
  19. 19.1% of 270 =
  20. 20.1% of 40 =
  21. 21.50% of 820 =
  22. 22.50% of 710 =
  23. 23.10% of 650 =
  24. 24.25% of 510 =
  25. 25.1% of 500 =
  26. 26.20% of 140 =
  27. 27.15% of 310 =
  28. 28.20% of 840 =
  29. 29.1% of 460 =
  30. 30.25% of 780 =
  31. 31.50% of 710 =
  32. 32.50% of 430 =
  33. 33.10% of 700 =
  34. 34.15% of 260 =
  35. 35.10% of 660 =
  36. 36.25% of 690 =
  37. 37.1% of 630 =
  38. 38.5% of 250 =
  39. 39.1% of 660 =
  40. 40.20% of 610 =

Answer key

  1. 172
  2. 3.5
  3. 80
  4. 28
  5. 2.5
  6. 2.4
  7. 37.5
  8. 36
  9. 132
  10. 24
  11. 112.5
  12. 7.1
  13. 38.5
  14. 6
  15. 62
  16. 72
  17. 70
  18. 44
  19. 2.7
  20. 0.4
  21. 410
  22. 355
  23. 65
  24. 127.5
  25. 5
  26. 28
  27. 46.5
  28. 168
  29. 4.6
  30. 195
  31. 355
  32. 215
  33. 70
  34. 39
  35. 66
  36. 172.5
  37. 6.3
  38. 12.5
  39. 6.6
  40. 122

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