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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 338 · 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. 1.15% of 880 =
  2. 2.10% of 600 =
  3. 3.1% of 660 =
  4. 4.20% of 850 =
  5. 5.10% of 890 =
  6. 6.1% of 240 =
  7. 7.15% of 40 =
  8. 8.20% of 360 =
  9. 9.5% of 370 =
  10. 10.1% of 100 =
  11. 11.1% of 430 =
  12. 12.20% of 880 =
  13. 13.10% of 430 =
  14. 14.20% of 140 =
  15. 15.15% of 210 =
  16. 16.15% of 100 =
  17. 17.5% of 350 =
  18. 18.25% of 470 =
  19. 19.15% of 50 =
  20. 20.20% of 900 =
  21. 21.5% of 130 =
  22. 22.15% of 590 =
  23. 23.50% of 810 =
  24. 24.15% of 890 =
  25. 25.15% of 370 =
  26. 26.15% of 620 =
  27. 27.10% of 40 =
  28. 28.5% of 280 =
  29. 29.10% of 400 =
  30. 30.1% of 500 =
  31. 31.1% of 830 =
  32. 32.50% of 130 =
  33. 33.5% of 670 =
  34. 34.20% of 320 =
  35. 35.10% of 800 =
  36. 36.15% of 580 =
  37. 37.10% of 30 =
  38. 38.20% of 120 =
  39. 39.5% of 540 =
  40. 40.50% of 420 =

Answer key

  1. 132
  2. 60
  3. 6.6
  4. 170
  5. 89
  6. 2.4
  7. 6
  8. 72
  9. 18.5
  10. 1
  11. 4.3
  12. 176
  13. 43
  14. 28
  15. 31.5
  16. 15
  17. 17.5
  18. 117.5
  19. 7.5
  20. 180
  21. 6.5
  22. 88.5
  23. 405
  24. 133.5
  25. 55.5
  26. 93
  27. 4
  28. 14
  29. 40
  30. 5
  31. 8.3
  32. 65
  33. 33.5
  34. 64
  35. 80
  36. 87
  37. 3
  38. 24
  39. 27
  40. 210

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