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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 83 · 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 30 =
  2. 2.1% of 330 =
  3. 3.10% of 870 =
  4. 4.10% of 250 =
  5. 5.1% of 750 =
  6. 6.1% of 560 =
  7. 7.5% of 250 =
  8. 8.5% of 200 =
  9. 9.5% of 70 =
  10. 10.20% of 470 =
  11. 11.50% of 210 =
  12. 12.5% of 160 =
  13. 13.1% of 500 =
  14. 14.10% of 890 =
  15. 15.20% of 390 =
  16. 16.1% of 480 =
  17. 17.5% of 850 =
  18. 18.10% of 150 =
  19. 19.15% of 230 =
  20. 20.5% of 50 =
  21. 21.15% of 290 =
  22. 22.5% of 40 =
  23. 23.15% of 500 =
  24. 24.1% of 670 =
  25. 25.10% of 610 =
  26. 26.25% of 370 =
  27. 27.25% of 510 =
  28. 28.25% of 600 =
  29. 29.10% of 450 =
  30. 30.15% of 20 =
  31. 31.5% of 720 =
  32. 32.15% of 850 =
  33. 33.50% of 470 =
  34. 34.10% of 420 =
  35. 35.1% of 220 =
  36. 36.50% of 700 =
  37. 37.20% of 140 =
  38. 38.10% of 880 =
  39. 39.5% of 330 =
  40. 40.10% of 460 =

Answer key

  1. 3
  2. 3.3
  3. 87
  4. 25
  5. 7.5
  6. 5.6
  7. 12.5
  8. 10
  9. 3.5
  10. 94
  11. 105
  12. 8
  13. 5
  14. 89
  15. 78
  16. 4.8
  17. 42.5
  18. 15
  19. 34.5
  20. 2.5
  21. 43.5
  22. 2
  23. 75
  24. 6.7
  25. 61
  26. 92.5
  27. 127.5
  28. 150
  29. 45
  30. 3
  31. 36
  32. 127.5
  33. 235
  34. 42
  35. 2.2
  36. 350
  37. 28
  38. 88
  39. 16.5
  40. 46

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