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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 322 · 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 470 =
  2. 2.5% of 90 =
  3. 3.15% of 360 =
  4. 4.20% of 460 =
  5. 5.25% of 440 =
  6. 6.1% of 370 =
  7. 7.10% of 130 =
  8. 8.25% of 360 =
  9. 9.15% of 220 =
  10. 10.10% of 820 =
  11. 11.5% of 90 =
  12. 12.1% of 480 =
  13. 13.15% of 330 =
  14. 14.20% of 30 =
  15. 15.20% of 330 =
  16. 16.50% of 350 =
  17. 17.50% of 400 =
  18. 18.20% of 80 =
  19. 19.10% of 380 =
  20. 20.1% of 260 =
  21. 21.15% of 460 =
  22. 22.5% of 780 =
  23. 23.50% of 550 =
  24. 24.20% of 30 =
  25. 25.10% of 710 =
  26. 26.10% of 620 =
  27. 27.25% of 400 =
  28. 28.15% of 710 =
  29. 29.25% of 510 =
  30. 30.50% of 220 =
  31. 31.5% of 170 =
  32. 32.20% of 660 =
  33. 33.1% of 730 =
  34. 34.1% of 890 =
  35. 35.15% of 520 =
  36. 36.50% of 130 =
  37. 37.15% of 640 =
  38. 38.10% of 710 =
  39. 39.25% of 490 =
  40. 40.1% of 150 =

Answer key

  1. 70.5
  2. 4.5
  3. 54
  4. 92
  5. 110
  6. 3.7
  7. 13
  8. 90
  9. 33
  10. 82
  11. 4.5
  12. 4.8
  13. 49.5
  14. 6
  15. 66
  16. 175
  17. 200
  18. 16
  19. 38
  20. 2.6
  21. 69
  22. 39
  23. 275
  24. 6
  25. 71
  26. 62
  27. 100
  28. 106.5
  29. 127.5
  30. 110
  31. 8.5
  32. 132
  33. 7.3
  34. 8.9
  35. 78
  36. 65
  37. 96
  38. 71
  39. 122.5
  40. 1.5

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