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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 500 · 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 390 =
  2. 2.10% of 240 =
  3. 3.10% of 230 =
  4. 4.5% of 200 =
  5. 5.50% of 30 =
  6. 6.10% of 660 =
  7. 7.10% of 420 =
  8. 8.15% of 130 =
  9. 9.50% of 500 =
  10. 10.50% of 130 =
  11. 11.20% of 480 =
  12. 12.20% of 20 =
  13. 13.1% of 160 =
  14. 14.25% of 900 =
  15. 15.1% of 420 =
  16. 16.25% of 350 =
  17. 17.10% of 570 =
  18. 18.10% of 490 =
  19. 19.25% of 30 =
  20. 20.5% of 100 =
  21. 21.5% of 740 =
  22. 22.20% of 100 =
  23. 23.15% of 340 =
  24. 24.20% of 400 =
  25. 25.25% of 830 =
  26. 26.15% of 140 =
  27. 27.50% of 160 =
  28. 28.50% of 120 =
  29. 29.50% of 820 =
  30. 30.10% of 770 =
  31. 31.5% of 890 =
  32. 32.15% of 270 =
  33. 33.20% of 280 =
  34. 34.10% of 50 =
  35. 35.20% of 520 =
  36. 36.20% of 500 =
  37. 37.50% of 800 =
  38. 38.50% of 570 =
  39. 39.20% of 100 =
  40. 40.10% of 540 =

Answer key

  1. 39
  2. 24
  3. 23
  4. 10
  5. 15
  6. 66
  7. 42
  8. 19.5
  9. 250
  10. 65
  11. 96
  12. 4
  13. 1.6
  14. 225
  15. 4.2
  16. 87.5
  17. 57
  18. 49
  19. 7.5
  20. 5
  21. 37
  22. 20
  23. 51
  24. 80
  25. 207.5
  26. 21
  27. 80
  28. 60
  29. 410
  30. 77
  31. 44.5
  32. 40.5
  33. 56
  34. 5
  35. 104
  36. 100
  37. 400
  38. 285
  39. 20
  40. 54

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