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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 417 · 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. 1.1% of 540 =
  2. 2.20% of 440 =
  3. 3.20% of 710 =
  4. 4.25% of 140 =
  5. 5.1% of 300 =
  6. 6.25% of 250 =
  7. 7.10% of 590 =
  8. 8.1% of 130 =
  9. 9.25% of 890 =
  10. 10.10% of 700 =
  11. 11.20% of 380 =
  12. 12.10% of 480 =
  13. 13.50% of 700 =
  14. 14.15% of 830 =
  15. 15.15% of 140 =
  16. 16.5% of 70 =
  17. 17.5% of 210 =
  18. 18.25% of 900 =
  19. 19.10% of 880 =
  20. 20.5% of 490 =
  21. 21.50% of 550 =
  22. 22.15% of 230 =
  23. 23.10% of 780 =
  24. 24.15% of 70 =
  25. 25.15% of 200 =
  26. 26.20% of 40 =
  27. 27.25% of 500 =
  28. 28.25% of 30 =
  29. 29.25% of 450 =
  30. 30.50% of 210 =
  31. 31.1% of 820 =
  32. 32.5% of 140 =
  33. 33.1% of 730 =
  34. 34.10% of 240 =
  35. 35.50% of 130 =
  36. 36.25% of 130 =
  37. 37.20% of 500 =
  38. 38.20% of 610 =
  39. 39.5% of 210 =
  40. 40.1% of 400 =

Answer key

  1. 5.4
  2. 88
  3. 142
  4. 35
  5. 3
  6. 62.5
  7. 59
  8. 1.3
  9. 222.5
  10. 70
  11. 76
  12. 48
  13. 350
  14. 124.5
  15. 21
  16. 3.5
  17. 10.5
  18. 225
  19. 88
  20. 24.5
  21. 275
  22. 34.5
  23. 78
  24. 10.5
  25. 30
  26. 8
  27. 125
  28. 7.5
  29. 112.5
  30. 105
  31. 8.2
  32. 7
  33. 7.3
  34. 24
  35. 65
  36. 32.5
  37. 100
  38. 122
  39. 10.5
  40. 4

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