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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 775 · 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. 1.25% of 570 =
  2. 2.50% of 30 =
  3. 3.50% of 380 =
  4. 4.50% of 450 =
  5. 5.15% of 450 =
  6. 6.20% of 830 =
  7. 7.25% of 440 =
  8. 8.25% of 870 =
  9. 9.25% of 170 =
  10. 10.25% of 250 =
  11. 11.20% of 510 =
  12. 12.20% of 810 =
  13. 13.5% of 580 =
  14. 14.10% of 50 =
  15. 15.50% of 540 =
  16. 16.20% of 340 =
  17. 17.5% of 450 =
  18. 18.50% of 400 =
  19. 19.20% of 850 =
  20. 20.15% of 300 =
  21. 21.5% of 40 =
  22. 22.25% of 370 =
  23. 23.25% of 250 =
  24. 24.15% of 740 =
  25. 25.10% of 330 =
  26. 26.10% of 130 =
  27. 27.15% of 330 =
  28. 28.10% of 890 =
  29. 29.50% of 510 =
  30. 30.5% of 120 =
  31. 31.5% of 180 =
  32. 32.15% of 780 =
  33. 33.20% of 900 =
  34. 34.1% of 60 =
  35. 35.10% of 160 =
  36. 36.25% of 230 =
  37. 37.25% of 520 =
  38. 38.15% of 180 =
  39. 39.50% of 20 =
  40. 40.20% of 350 =

Answer key

  1. 142.5
  2. 15
  3. 190
  4. 225
  5. 67.5
  6. 166
  7. 110
  8. 217.5
  9. 42.5
  10. 62.5
  11. 102
  12. 162
  13. 29
  14. 5
  15. 270
  16. 68
  17. 22.5
  18. 200
  19. 170
  20. 45
  21. 2
  22. 92.5
  23. 62.5
  24. 111
  25. 33
  26. 13
  27. 49.5
  28. 89
  29. 255
  30. 6
  31. 9
  32. 117
  33. 180
  34. 0.6
  35. 16
  36. 57.5
  37. 130
  38. 27
  39. 10
  40. 70

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