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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 82 · 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 790 =
  2. 2.20% of 410 =
  3. 3.20% of 140 =
  4. 4.5% of 580 =
  5. 5.10% of 450 =
  6. 6.10% of 900 =
  7. 7.15% of 580 =
  8. 8.1% of 510 =
  9. 9.1% of 640 =
  10. 10.5% of 50 =
  11. 11.5% of 750 =
  12. 12.25% of 40 =
  13. 13.5% of 680 =
  14. 14.5% of 190 =
  15. 15.15% of 380 =
  16. 16.50% of 290 =
  17. 17.25% of 820 =
  18. 18.15% of 220 =
  19. 19.20% of 520 =
  20. 20.10% of 770 =
  21. 21.25% of 810 =
  22. 22.5% of 380 =
  23. 23.10% of 270 =
  24. 24.10% of 60 =
  25. 25.50% of 570 =
  26. 26.1% of 810 =
  27. 27.20% of 690 =
  28. 28.15% of 140 =
  29. 29.15% of 690 =
  30. 30.1% of 120 =
  31. 31.10% of 690 =
  32. 32.5% of 770 =
  33. 33.20% of 580 =
  34. 34.5% of 160 =
  35. 35.1% of 460 =
  36. 36.5% of 760 =
  37. 37.20% of 500 =
  38. 38.10% of 380 =
  39. 39.25% of 260 =
  40. 40.25% of 40 =

Answer key

  1. 158
  2. 82
  3. 28
  4. 29
  5. 45
  6. 90
  7. 87
  8. 5.1
  9. 6.4
  10. 2.5
  11. 37.5
  12. 10
  13. 34
  14. 9.5
  15. 57
  16. 145
  17. 205
  18. 33
  19. 104
  20. 77
  21. 202.5
  22. 19
  23. 27
  24. 6
  25. 285
  26. 8.1
  27. 138
  28. 21
  29. 103.5
  30. 1.2
  31. 69
  32. 38.5
  33. 116
  34. 8
  35. 4.6
  36. 38
  37. 100
  38. 38
  39. 65
  40. 10

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