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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 391 · 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. 1.5% of 290 =
  2. 2.25% of 160 =
  3. 3.15% of 700 =
  4. 4.1% of 70 =
  5. 5.10% of 190 =
  6. 6.1% of 460 =
  7. 7.5% of 360 =
  8. 8.10% of 790 =
  9. 9.15% of 820 =
  10. 10.15% of 860 =
  11. 11.50% of 780 =
  12. 12.1% of 880 =
  13. 13.25% of 550 =
  14. 14.20% of 730 =
  15. 15.15% of 400 =
  16. 16.10% of 400 =
  17. 17.20% of 190 =
  18. 18.1% of 700 =
  19. 19.1% of 140 =
  20. 20.10% of 480 =
  21. 21.5% of 700 =
  22. 22.15% of 190 =
  23. 23.15% of 260 =
  24. 24.25% of 810 =
  25. 25.50% of 220 =
  26. 26.50% of 50 =
  27. 27.50% of 180 =
  28. 28.50% of 780 =
  29. 29.15% of 270 =
  30. 30.1% of 240 =
  31. 31.50% of 520 =
  32. 32.1% of 640 =
  33. 33.5% of 660 =
  34. 34.20% of 40 =
  35. 35.10% of 670 =
  36. 36.1% of 250 =
  37. 37.50% of 60 =
  38. 38.1% of 360 =
  39. 39.20% of 250 =
  40. 40.25% of 400 =

Answer key

  1. 14.5
  2. 40
  3. 105
  4. 0.7
  5. 19
  6. 4.6
  7. 18
  8. 79
  9. 123
  10. 129
  11. 390
  12. 8.8
  13. 137.5
  14. 146
  15. 60
  16. 40
  17. 38
  18. 7
  19. 1.4
  20. 48
  21. 35
  22. 28.5
  23. 39
  24. 202.5
  25. 110
  26. 25
  27. 90
  28. 390
  29. 40.5
  30. 2.4
  31. 260
  32. 6.4
  33. 33
  34. 8
  35. 67
  36. 2.5
  37. 30
  38. 3.6
  39. 50
  40. 100

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