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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 310 · 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 530 =
  2. 2.20% of 840 =
  3. 3.10% of 30 =
  4. 4.50% of 420 =
  5. 5.5% of 250 =
  6. 6.20% of 350 =
  7. 7.10% of 590 =
  8. 8.10% of 640 =
  9. 9.10% of 880 =
  10. 10.25% of 270 =
  11. 11.15% of 380 =
  12. 12.5% of 330 =
  13. 13.5% of 240 =
  14. 14.25% of 250 =
  15. 15.20% of 590 =
  16. 16.10% of 730 =
  17. 17.5% of 660 =
  18. 18.1% of 520 =
  19. 19.1% of 410 =
  20. 20.5% of 30 =
  21. 21.15% of 600 =
  22. 22.1% of 800 =
  23. 23.5% of 290 =
  24. 24.50% of 120 =
  25. 25.15% of 270 =
  26. 26.50% of 790 =
  27. 27.1% of 670 =
  28. 28.25% of 470 =
  29. 29.15% of 530 =
  30. 30.25% of 90 =
  31. 31.1% of 520 =
  32. 32.5% of 450 =
  33. 33.5% of 380 =
  34. 34.5% of 20 =
  35. 35.50% of 830 =
  36. 36.10% of 480 =
  37. 37.15% of 110 =
  38. 38.50% of 230 =
  39. 39.20% of 20 =
  40. 40.10% of 250 =

Answer key

  1. 106
  2. 168
  3. 3
  4. 210
  5. 12.5
  6. 70
  7. 59
  8. 64
  9. 88
  10. 67.5
  11. 57
  12. 16.5
  13. 12
  14. 62.5
  15. 118
  16. 73
  17. 33
  18. 5.2
  19. 4.1
  20. 1.5
  21. 90
  22. 8
  23. 14.5
  24. 60
  25. 40.5
  26. 395
  27. 6.7
  28. 117.5
  29. 79.5
  30. 22.5
  31. 5.2
  32. 22.5
  33. 19
  34. 1
  35. 415
  36. 48
  37. 16.5
  38. 115
  39. 4
  40. 25

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