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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 237 · 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. 1.50% of 810 =
  2. 2.5% of 410 =
  3. 3.15% of 690 =
  4. 4.20% of 320 =
  5. 5.5% of 650 =
  6. 6.10% of 540 =
  7. 7.20% of 30 =
  8. 8.5% of 440 =
  9. 9.50% of 630 =
  10. 10.5% of 140 =
  11. 11.10% of 770 =
  12. 12.25% of 560 =
  13. 13.1% of 40 =
  14. 14.50% of 570 =
  15. 15.15% of 690 =
  16. 16.10% of 660 =
  17. 17.20% of 300 =
  18. 18.10% of 730 =
  19. 19.5% of 540 =
  20. 20.20% of 770 =
  21. 21.15% of 590 =
  22. 22.50% of 630 =
  23. 23.25% of 680 =
  24. 24.10% of 700 =
  25. 25.50% of 790 =
  26. 26.1% of 870 =
  27. 27.25% of 870 =
  28. 28.50% of 700 =
  29. 29.5% of 430 =
  30. 30.50% of 770 =
  31. 31.10% of 830 =
  32. 32.5% of 300 =
  33. 33.25% of 890 =
  34. 34.10% of 30 =
  35. 35.25% of 580 =
  36. 36.1% of 120 =
  37. 37.50% of 320 =
  38. 38.15% of 740 =
  39. 39.25% of 540 =
  40. 40.5% of 780 =

Answer key

  1. 405
  2. 20.5
  3. 103.5
  4. 64
  5. 32.5
  6. 54
  7. 6
  8. 22
  9. 315
  10. 7
  11. 77
  12. 140
  13. 0.4
  14. 285
  15. 103.5
  16. 66
  17. 60
  18. 73
  19. 27
  20. 154
  21. 88.5
  22. 315
  23. 170
  24. 70
  25. 395
  26. 8.7
  27. 217.5
  28. 350
  29. 21.5
  30. 385
  31. 83
  32. 15
  33. 222.5
  34. 3
  35. 145
  36. 1.2
  37. 160
  38. 111
  39. 135
  40. 39

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