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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 480 · 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. 1.1% of 520 =
  2. 2.10% of 60 =
  3. 3.5% of 690 =
  4. 4.25% of 60 =
  5. 5.10% of 800 =
  6. 6.10% of 450 =
  7. 7.25% of 530 =
  8. 8.50% of 450 =
  9. 9.5% of 390 =
  10. 10.10% of 60 =
  11. 11.1% of 780 =
  12. 12.20% of 440 =
  13. 13.50% of 250 =
  14. 14.10% of 760 =
  15. 15.5% of 400 =
  16. 16.25% of 410 =
  17. 17.25% of 460 =
  18. 18.15% of 520 =
  19. 19.15% of 770 =
  20. 20.15% of 610 =
  21. 21.1% of 20 =
  22. 22.5% of 720 =
  23. 23.10% of 300 =
  24. 24.1% of 100 =
  25. 25.10% of 730 =
  26. 26.15% of 550 =
  27. 27.10% of 670 =
  28. 28.1% of 770 =
  29. 29.10% of 490 =
  30. 30.25% of 110 =
  31. 31.10% of 100 =
  32. 32.15% of 70 =
  33. 33.20% of 710 =
  34. 34.15% of 770 =
  35. 35.15% of 790 =
  36. 36.20% of 300 =
  37. 37.5% of 180 =
  38. 38.25% of 230 =
  39. 39.10% of 470 =
  40. 40.50% of 690 =

Answer key

  1. 5.2
  2. 6
  3. 34.5
  4. 15
  5. 80
  6. 45
  7. 132.5
  8. 225
  9. 19.5
  10. 6
  11. 7.8
  12. 88
  13. 125
  14. 76
  15. 20
  16. 102.5
  17. 115
  18. 78
  19. 115.5
  20. 91.5
  21. 0.2
  22. 36
  23. 30
  24. 1
  25. 73
  26. 82.5
  27. 67
  28. 7.7
  29. 49
  30. 27.5
  31. 10
  32. 10.5
  33. 142
  34. 115.5
  35. 118.5
  36. 60
  37. 9
  38. 57.5
  39. 47
  40. 345

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