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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 209 · 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 530 =
  2. 2.1% of 420 =
  3. 3.10% of 730 =
  4. 4.25% of 790 =
  5. 5.25% of 470 =
  6. 6.5% of 340 =
  7. 7.25% of 700 =
  8. 8.1% of 150 =
  9. 9.15% of 880 =
  10. 10.15% of 130 =
  11. 11.10% of 630 =
  12. 12.25% of 600 =
  13. 13.25% of 90 =
  14. 14.10% of 580 =
  15. 15.20% of 540 =
  16. 16.5% of 40 =
  17. 17.1% of 670 =
  18. 18.5% of 70 =
  19. 19.20% of 90 =
  20. 20.15% of 890 =
  21. 21.20% of 720 =
  22. 22.5% of 350 =
  23. 23.5% of 520 =
  24. 24.5% of 40 =
  25. 25.20% of 550 =
  26. 26.1% of 520 =
  27. 27.25% of 750 =
  28. 28.10% of 470 =
  29. 29.25% of 900 =
  30. 30.1% of 260 =
  31. 31.25% of 410 =
  32. 32.15% of 530 =
  33. 33.5% of 740 =
  34. 34.1% of 190 =
  35. 35.20% of 230 =
  36. 36.50% of 810 =
  37. 37.1% of 470 =
  38. 38.5% of 640 =
  39. 39.10% of 490 =
  40. 40.25% of 850 =

Answer key

  1. 53
  2. 4.2
  3. 73
  4. 197.5
  5. 117.5
  6. 17
  7. 175
  8. 1.5
  9. 132
  10. 19.5
  11. 63
  12. 150
  13. 22.5
  14. 58
  15. 108
  16. 2
  17. 6.7
  18. 3.5
  19. 18
  20. 133.5
  21. 144
  22. 17.5
  23. 26
  24. 2
  25. 110
  26. 5.2
  27. 187.5
  28. 47
  29. 225
  30. 2.6
  31. 102.5
  32. 79.5
  33. 37
  34. 1.9
  35. 46
  36. 405
  37. 4.7
  38. 32
  39. 49
  40. 212.5

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