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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 30 · 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. 1.10% of 710 =
  2. 2.20% of 80 =
  3. 3.20% of 320 =
  4. 4.25% of 530 =
  5. 5.50% of 850 =
  6. 6.25% of 140 =
  7. 7.5% of 740 =
  8. 8.1% of 890 =
  9. 9.5% of 70 =
  10. 10.15% of 670 =
  11. 11.10% of 590 =
  12. 12.50% of 800 =
  13. 13.15% of 300 =
  14. 14.10% of 230 =
  15. 15.5% of 330 =
  16. 16.5% of 200 =
  17. 17.25% of 320 =
  18. 18.50% of 680 =
  19. 19.20% of 40 =
  20. 20.50% of 810 =
  21. 21.25% of 180 =
  22. 22.1% of 520 =
  23. 23.15% of 620 =
  24. 24.10% of 850 =
  25. 25.25% of 450 =
  26. 26.10% of 330 =
  27. 27.20% of 410 =
  28. 28.1% of 700 =
  29. 29.25% of 610 =
  30. 30.10% of 440 =
  31. 31.5% of 260 =
  32. 32.1% of 280 =
  33. 33.15% of 50 =
  34. 34.50% of 580 =
  35. 35.50% of 520 =
  36. 36.5% of 200 =
  37. 37.50% of 30 =
  38. 38.15% of 540 =
  39. 39.5% of 530 =
  40. 40.15% of 780 =

Answer key

  1. 71
  2. 16
  3. 64
  4. 132.5
  5. 425
  6. 35
  7. 37
  8. 8.9
  9. 3.5
  10. 100.5
  11. 59
  12. 400
  13. 45
  14. 23
  15. 16.5
  16. 10
  17. 80
  18. 340
  19. 8
  20. 405
  21. 45
  22. 5.2
  23. 93
  24. 85
  25. 112.5
  26. 33
  27. 82
  28. 7
  29. 152.5
  30. 44
  31. 13
  32. 2.8
  33. 7.5
  34. 290
  35. 260
  36. 10
  37. 15
  38. 81
  39. 26.5
  40. 117

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