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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 433 · 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. 1.15% of 20 =
  2. 2.1% of 690 =
  3. 3.15% of 880 =
  4. 4.50% of 670 =
  5. 5.5% of 530 =
  6. 6.15% of 610 =
  7. 7.20% of 300 =
  8. 8.5% of 720 =
  9. 9.25% of 110 =
  10. 10.20% of 230 =
  11. 11.20% of 570 =
  12. 12.5% of 760 =
  13. 13.1% of 810 =
  14. 14.20% of 900 =
  15. 15.10% of 870 =
  16. 16.10% of 260 =
  17. 17.25% of 580 =
  18. 18.20% of 70 =
  19. 19.10% of 770 =
  20. 20.5% of 560 =
  21. 21.1% of 810 =
  22. 22.50% of 240 =
  23. 23.50% of 830 =
  24. 24.5% of 420 =
  25. 25.15% of 550 =
  26. 26.1% of 160 =
  27. 27.20% of 350 =
  28. 28.5% of 660 =
  29. 29.5% of 60 =
  30. 30.20% of 450 =
  31. 31.20% of 630 =
  32. 32.25% of 760 =
  33. 33.5% of 80 =
  34. 34.15% of 870 =
  35. 35.5% of 530 =
  36. 36.50% of 170 =
  37. 37.5% of 80 =
  38. 38.25% of 250 =
  39. 39.15% of 410 =
  40. 40.20% of 40 =

Answer key

  1. 3
  2. 6.9
  3. 132
  4. 335
  5. 26.5
  6. 91.5
  7. 60
  8. 36
  9. 27.5
  10. 46
  11. 114
  12. 38
  13. 8.1
  14. 180
  15. 87
  16. 26
  17. 145
  18. 14
  19. 77
  20. 28
  21. 8.1
  22. 120
  23. 415
  24. 21
  25. 82.5
  26. 1.6
  27. 70
  28. 33
  29. 3
  30. 90
  31. 126
  32. 190
  33. 4
  34. 130.5
  35. 26.5
  36. 85
  37. 4
  38. 62.5
  39. 61.5
  40. 8

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