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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 32 · 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 290 =
  2. 2.10% of 770 =
  3. 3.20% of 660 =
  4. 4.1% of 890 =
  5. 5.15% of 830 =
  6. 6.25% of 380 =
  7. 7.10% of 50 =
  8. 8.20% of 720 =
  9. 9.25% of 900 =
  10. 10.20% of 30 =
  11. 11.15% of 580 =
  12. 12.20% of 330 =
  13. 13.50% of 700 =
  14. 14.10% of 820 =
  15. 15.10% of 130 =
  16. 16.50% of 60 =
  17. 17.25% of 590 =
  18. 18.5% of 600 =
  19. 19.10% of 540 =
  20. 20.50% of 40 =
  21. 21.15% of 850 =
  22. 22.20% of 90 =
  23. 23.50% of 350 =
  24. 24.20% of 350 =
  25. 25.15% of 390 =
  26. 26.50% of 130 =
  27. 27.25% of 410 =
  28. 28.20% of 180 =
  29. 29.10% of 170 =
  30. 30.50% of 810 =
  31. 31.50% of 590 =
  32. 32.5% of 40 =
  33. 33.15% of 380 =
  34. 34.15% of 110 =
  35. 35.50% of 440 =
  36. 36.10% of 140 =
  37. 37.1% of 290 =
  38. 38.10% of 180 =
  39. 39.1% of 20 =
  40. 40.5% of 640 =

Answer key

  1. 43.5
  2. 77
  3. 132
  4. 8.9
  5. 124.5
  6. 95
  7. 5
  8. 144
  9. 225
  10. 6
  11. 87
  12. 66
  13. 350
  14. 82
  15. 13
  16. 30
  17. 147.5
  18. 30
  19. 54
  20. 20
  21. 127.5
  22. 18
  23. 175
  24. 70
  25. 58.5
  26. 65
  27. 102.5
  28. 36
  29. 17
  30. 405
  31. 295
  32. 2
  33. 57
  34. 16.5
  35. 220
  36. 14
  37. 2.9
  38. 18
  39. 0.2
  40. 32

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