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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 462 · 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 140 =
  2. 2.20% of 90 =
  3. 3.15% of 240 =
  4. 4.15% of 470 =
  5. 5.1% of 330 =
  6. 6.20% of 110 =
  7. 7.25% of 360 =
  8. 8.15% of 840 =
  9. 9.50% of 660 =
  10. 10.20% of 240 =
  11. 11.15% of 40 =
  12. 12.25% of 480 =
  13. 13.5% of 160 =
  14. 14.5% of 110 =
  15. 15.1% of 820 =
  16. 16.15% of 720 =
  17. 17.20% of 820 =
  18. 18.20% of 260 =
  19. 19.10% of 140 =
  20. 20.1% of 490 =
  21. 21.50% of 440 =
  22. 22.10% of 670 =
  23. 23.15% of 680 =
  24. 24.50% of 130 =
  25. 25.10% of 70 =
  26. 26.10% of 610 =
  27. 27.50% of 350 =
  28. 28.25% of 110 =
  29. 29.10% of 400 =
  30. 30.50% of 60 =
  31. 31.25% of 360 =
  32. 32.5% of 210 =
  33. 33.1% of 580 =
  34. 34.1% of 270 =
  35. 35.1% of 450 =
  36. 36.1% of 200 =
  37. 37.5% of 860 =
  38. 38.25% of 670 =
  39. 39.15% of 570 =
  40. 40.20% of 60 =

Answer key

  1. 35
  2. 18
  3. 36
  4. 70.5
  5. 3.3
  6. 22
  7. 90
  8. 126
  9. 330
  10. 48
  11. 6
  12. 120
  13. 8
  14. 5.5
  15. 8.2
  16. 108
  17. 164
  18. 52
  19. 14
  20. 4.9
  21. 220
  22. 67
  23. 102
  24. 65
  25. 7
  26. 61
  27. 175
  28. 27.5
  29. 40
  30. 30
  31. 90
  32. 10.5
  33. 5.8
  34. 2.7
  35. 4.5
  36. 2
  37. 43
  38. 167.5
  39. 85.5
  40. 12

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