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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 17 · 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 510 =
  2. 2.25% of 50 =
  3. 3.50% of 170 =
  4. 4.5% of 460 =
  5. 5.50% of 290 =
  6. 6.15% of 440 =
  7. 7.20% of 900 =
  8. 8.1% of 20 =
  9. 9.20% of 730 =
  10. 10.1% of 560 =
  11. 11.20% of 680 =
  12. 12.50% of 190 =
  13. 13.50% of 130 =
  14. 14.20% of 700 =
  15. 15.15% of 670 =
  16. 16.50% of 460 =
  17. 17.5% of 650 =
  18. 18.20% of 60 =
  19. 19.15% of 720 =
  20. 20.20% of 410 =
  21. 21.10% of 860 =
  22. 22.50% of 290 =
  23. 23.10% of 530 =
  24. 24.5% of 40 =
  25. 25.20% of 520 =
  26. 26.5% of 160 =
  27. 27.1% of 420 =
  28. 28.10% of 400 =
  29. 29.10% of 20 =
  30. 30.50% of 250 =
  31. 31.10% of 890 =
  32. 32.1% of 840 =
  33. 33.5% of 600 =
  34. 34.50% of 500 =
  35. 35.5% of 350 =
  36. 36.25% of 640 =
  37. 37.10% of 420 =
  38. 38.50% of 540 =
  39. 39.25% of 430 =
  40. 40.20% of 160 =

Answer key

  1. 76.5
  2. 12.5
  3. 85
  4. 23
  5. 145
  6. 66
  7. 180
  8. 0.2
  9. 146
  10. 5.6
  11. 136
  12. 95
  13. 65
  14. 140
  15. 100.5
  16. 230
  17. 32.5
  18. 12
  19. 108
  20. 82
  21. 86
  22. 145
  23. 53
  24. 2
  25. 104
  26. 8
  27. 4.2
  28. 40
  29. 2
  30. 125
  31. 89
  32. 8.4
  33. 30
  34. 250
  35. 17.5
  36. 160
  37. 42
  38. 270
  39. 107.5
  40. 32

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