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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 48 · 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. 1.5% of 900 =
  2. 2.10% of 730 =
  3. 3.10% of 660 =
  4. 4.20% of 830 =
  5. 5.5% of 830 =
  6. 6.1% of 130 =
  7. 7.10% of 80 =
  8. 8.15% of 230 =
  9. 9.25% of 190 =
  10. 10.5% of 530 =
  11. 11.50% of 570 =
  12. 12.1% of 850 =
  13. 13.10% of 750 =
  14. 14.25% of 90 =
  15. 15.50% of 670 =
  16. 16.25% of 580 =
  17. 17.15% of 580 =
  18. 18.25% of 390 =
  19. 19.10% of 690 =
  20. 20.15% of 280 =
  21. 21.15% of 660 =
  22. 22.50% of 480 =
  23. 23.10% of 850 =
  24. 24.25% of 90 =
  25. 25.10% of 300 =
  26. 26.50% of 240 =
  27. 27.15% of 330 =
  28. 28.5% of 200 =
  29. 29.5% of 500 =
  30. 30.15% of 100 =
  31. 31.25% of 270 =
  32. 32.15% of 100 =
  33. 33.20% of 170 =
  34. 34.10% of 650 =
  35. 35.15% of 890 =
  36. 36.50% of 170 =
  37. 37.15% of 300 =
  38. 38.20% of 900 =
  39. 39.15% of 570 =
  40. 40.5% of 460 =

Answer key

  1. 45
  2. 73
  3. 66
  4. 166
  5. 41.5
  6. 1.3
  7. 8
  8. 34.5
  9. 47.5
  10. 26.5
  11. 285
  12. 8.5
  13. 75
  14. 22.5
  15. 335
  16. 145
  17. 87
  18. 97.5
  19. 69
  20. 42
  21. 99
  22. 240
  23. 85
  24. 22.5
  25. 30
  26. 120
  27. 49.5
  28. 10
  29. 25
  30. 15
  31. 67.5
  32. 15
  33. 34
  34. 65
  35. 133.5
  36. 85
  37. 45
  38. 180
  39. 85.5
  40. 23

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