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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 105 · 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 600 =
  2. 2.25% of 450 =
  3. 3.50% of 250 =
  4. 4.5% of 250 =
  5. 5.25% of 810 =
  6. 6.5% of 130 =
  7. 7.15% of 100 =
  8. 8.10% of 130 =
  9. 9.10% of 300 =
  10. 10.50% of 180 =
  11. 11.25% of 750 =
  12. 12.50% of 540 =
  13. 13.15% of 460 =
  14. 14.1% of 190 =
  15. 15.25% of 490 =
  16. 16.1% of 840 =
  17. 17.50% of 520 =
  18. 18.1% of 660 =
  19. 19.1% of 450 =
  20. 20.10% of 330 =
  21. 21.5% of 620 =
  22. 22.10% of 580 =
  23. 23.5% of 90 =
  24. 24.5% of 180 =
  25. 25.1% of 100 =
  26. 26.20% of 70 =
  27. 27.10% of 150 =
  28. 28.20% of 30 =
  29. 29.5% of 800 =
  30. 30.10% of 830 =
  31. 31.15% of 620 =
  32. 32.25% of 90 =
  33. 33.10% of 740 =
  34. 34.50% of 880 =
  35. 35.50% of 160 =
  36. 36.50% of 490 =
  37. 37.25% of 470 =
  38. 38.10% of 280 =
  39. 39.1% of 250 =
  40. 40.15% of 130 =

Answer key

  1. 120
  2. 112.5
  3. 125
  4. 12.5
  5. 202.5
  6. 6.5
  7. 15
  8. 13
  9. 30
  10. 90
  11. 187.5
  12. 270
  13. 69
  14. 1.9
  15. 122.5
  16. 8.4
  17. 260
  18. 6.6
  19. 4.5
  20. 33
  21. 31
  22. 58
  23. 4.5
  24. 9
  25. 1
  26. 14
  27. 15
  28. 6
  29. 40
  30. 83
  31. 93
  32. 22.5
  33. 74
  34. 440
  35. 80
  36. 245
  37. 117.5
  38. 28
  39. 2.5
  40. 19.5

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