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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 662 · 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 330 =
  2. 2.25% of 420 =
  3. 3.1% of 250 =
  4. 4.1% of 530 =
  5. 5.15% of 420 =
  6. 6.25% of 30 =
  7. 7.20% of 600 =
  8. 8.50% of 540 =
  9. 9.50% of 740 =
  10. 10.10% of 40 =
  11. 11.20% of 20 =
  12. 12.5% of 760 =
  13. 13.25% of 540 =
  14. 14.1% of 520 =
  15. 15.15% of 690 =
  16. 16.20% of 820 =
  17. 17.50% of 210 =
  18. 18.20% of 520 =
  19. 19.25% of 100 =
  20. 20.50% of 80 =
  21. 21.15% of 810 =
  22. 22.15% of 460 =
  23. 23.15% of 200 =
  24. 24.25% of 230 =
  25. 25.20% of 610 =
  26. 26.20% of 500 =
  27. 27.10% of 730 =
  28. 28.25% of 430 =
  29. 29.25% of 130 =
  30. 30.15% of 580 =
  31. 31.20% of 490 =
  32. 32.5% of 890 =
  33. 33.50% of 320 =
  34. 34.50% of 400 =
  35. 35.15% of 190 =
  36. 36.15% of 670 =
  37. 37.15% of 250 =
  38. 38.20% of 230 =
  39. 39.10% of 370 =
  40. 40.50% of 410 =

Answer key

  1. 3.3
  2. 105
  3. 2.5
  4. 5.3
  5. 63
  6. 7.5
  7. 120
  8. 270
  9. 370
  10. 4
  11. 4
  12. 38
  13. 135
  14. 5.2
  15. 103.5
  16. 164
  17. 105
  18. 104
  19. 25
  20. 40
  21. 121.5
  22. 69
  23. 30
  24. 57.5
  25. 122
  26. 100
  27. 73
  28. 107.5
  29. 32.5
  30. 87
  31. 98
  32. 44.5
  33. 160
  34. 200
  35. 28.5
  36. 100.5
  37. 37.5
  38. 46
  39. 37
  40. 205

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