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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 455 · 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 400 =
  2. 2.10% of 660 =
  3. 3.10% of 250 =
  4. 4.20% of 250 =
  5. 5.1% of 140 =
  6. 6.50% of 540 =
  7. 7.1% of 810 =
  8. 8.10% of 730 =
  9. 9.20% of 700 =
  10. 10.15% of 350 =
  11. 11.20% of 110 =
  12. 12.15% of 750 =
  13. 13.15% of 840 =
  14. 14.10% of 620 =
  15. 15.15% of 80 =
  16. 16.15% of 200 =
  17. 17.25% of 790 =
  18. 18.20% of 760 =
  19. 19.15% of 300 =
  20. 20.1% of 70 =
  21. 21.50% of 420 =
  22. 22.5% of 300 =
  23. 23.10% of 590 =
  24. 24.10% of 850 =
  25. 25.20% of 890 =
  26. 26.1% of 40 =
  27. 27.50% of 580 =
  28. 28.25% of 730 =
  29. 29.20% of 810 =
  30. 30.1% of 620 =
  31. 31.15% of 610 =
  32. 32.25% of 790 =
  33. 33.5% of 70 =
  34. 34.20% of 800 =
  35. 35.50% of 710 =
  36. 36.20% of 710 =
  37. 37.50% of 590 =
  38. 38.20% of 750 =
  39. 39.10% of 820 =
  40. 40.5% of 770 =

Answer key

  1. 80
  2. 66
  3. 25
  4. 50
  5. 1.4
  6. 270
  7. 8.1
  8. 73
  9. 140
  10. 52.5
  11. 22
  12. 112.5
  13. 126
  14. 62
  15. 12
  16. 30
  17. 197.5
  18. 152
  19. 45
  20. 0.7
  21. 210
  22. 15
  23. 59
  24. 85
  25. 178
  26. 0.4
  27. 290
  28. 182.5
  29. 162
  30. 6.2
  31. 91.5
  32. 197.5
  33. 3.5
  34. 160
  35. 355
  36. 142
  37. 295
  38. 150
  39. 82
  40. 38.5

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