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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 327 · 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 650 =
  2. 2.10% of 220 =
  3. 3.15% of 40 =
  4. 4.50% of 880 =
  5. 5.1% of 230 =
  6. 6.25% of 300 =
  7. 7.50% of 200 =
  8. 8.5% of 830 =
  9. 9.50% of 190 =
  10. 10.25% of 670 =
  11. 11.50% of 530 =
  12. 12.50% of 130 =
  13. 13.25% of 140 =
  14. 14.20% of 450 =
  15. 15.15% of 840 =
  16. 16.1% of 750 =
  17. 17.5% of 450 =
  18. 18.25% of 90 =
  19. 19.20% of 230 =
  20. 20.25% of 840 =
  21. 21.50% of 150 =
  22. 22.15% of 880 =
  23. 23.10% of 590 =
  24. 24.10% of 770 =
  25. 25.50% of 360 =
  26. 26.15% of 90 =
  27. 27.5% of 270 =
  28. 28.25% of 440 =
  29. 29.15% of 540 =
  30. 30.50% of 790 =
  31. 31.1% of 180 =
  32. 32.5% of 830 =
  33. 33.5% of 670 =
  34. 34.15% of 480 =
  35. 35.10% of 630 =
  36. 36.20% of 430 =
  37. 37.25% of 60 =
  38. 38.1% of 690 =
  39. 39.5% of 630 =
  40. 40.1% of 200 =

Answer key

  1. 65
  2. 22
  3. 6
  4. 440
  5. 2.3
  6. 75
  7. 100
  8. 41.5
  9. 95
  10. 167.5
  11. 265
  12. 65
  13. 35
  14. 90
  15. 126
  16. 7.5
  17. 22.5
  18. 22.5
  19. 46
  20. 210
  21. 75
  22. 132
  23. 59
  24. 77
  25. 180
  26. 13.5
  27. 13.5
  28. 110
  29. 81
  30. 395
  31. 1.8
  32. 41.5
  33. 33.5
  34. 72
  35. 63
  36. 86
  37. 15
  38. 6.9
  39. 31.5
  40. 2

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