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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 778 · 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. 1.50% of 70 =
  2. 2.50% of 220 =
  3. 3.5% of 20 =
  4. 4.10% of 850 =
  5. 5.15% of 130 =
  6. 6.20% of 470 =
  7. 7.5% of 420 =
  8. 8.1% of 820 =
  9. 9.1% of 890 =
  10. 10.25% of 440 =
  11. 11.20% of 610 =
  12. 12.10% of 530 =
  13. 13.20% of 480 =
  14. 14.5% of 620 =
  15. 15.50% of 20 =
  16. 16.25% of 800 =
  17. 17.50% of 450 =
  18. 18.1% of 150 =
  19. 19.10% of 180 =
  20. 20.10% of 80 =
  21. 21.10% of 390 =
  22. 22.5% of 790 =
  23. 23.50% of 130 =
  24. 24.5% of 450 =
  25. 25.20% of 350 =
  26. 26.10% of 240 =
  27. 27.5% of 810 =
  28. 28.10% of 420 =
  29. 29.15% of 270 =
  30. 30.10% of 660 =
  31. 31.5% of 140 =
  32. 32.20% of 100 =
  33. 33.15% of 350 =
  34. 34.10% of 660 =
  35. 35.15% of 780 =
  36. 36.10% of 290 =
  37. 37.50% of 580 =
  38. 38.15% of 70 =
  39. 39.5% of 540 =
  40. 40.10% of 450 =

Answer key

  1. 35
  2. 110
  3. 1
  4. 85
  5. 19.5
  6. 94
  7. 21
  8. 8.2
  9. 8.9
  10. 110
  11. 122
  12. 53
  13. 96
  14. 31
  15. 10
  16. 200
  17. 225
  18. 1.5
  19. 18
  20. 8
  21. 39
  22. 39.5
  23. 65
  24. 22.5
  25. 70
  26. 24
  27. 40.5
  28. 42
  29. 40.5
  30. 66
  31. 7
  32. 20
  33. 52.5
  34. 66
  35. 117
  36. 29
  37. 290
  38. 10.5
  39. 27
  40. 45

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