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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 995 · 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 540 =
  2. 2.25% of 110 =
  3. 3.10% of 840 =
  4. 4.50% of 580 =
  5. 5.50% of 150 =
  6. 6.5% of 140 =
  7. 7.25% of 440 =
  8. 8.25% of 870 =
  9. 9.15% of 20 =
  10. 10.20% of 520 =
  11. 11.25% of 310 =
  12. 12.50% of 30 =
  13. 13.1% of 710 =
  14. 14.15% of 820 =
  15. 15.15% of 410 =
  16. 16.50% of 840 =
  17. 17.1% of 270 =
  18. 18.25% of 200 =
  19. 19.1% of 600 =
  20. 20.10% of 790 =
  21. 21.5% of 810 =
  22. 22.5% of 190 =
  23. 23.15% of 250 =
  24. 24.5% of 330 =
  25. 25.10% of 530 =
  26. 26.20% of 520 =
  27. 27.20% of 710 =
  28. 28.50% of 500 =
  29. 29.5% of 50 =
  30. 30.25% of 460 =
  31. 31.25% of 420 =
  32. 32.10% of 480 =
  33. 33.15% of 250 =
  34. 34.10% of 120 =
  35. 35.1% of 790 =
  36. 36.20% of 780 =
  37. 37.1% of 540 =
  38. 38.20% of 560 =
  39. 39.20% of 40 =
  40. 40.15% of 310 =

Answer key

  1. 27
  2. 27.5
  3. 84
  4. 290
  5. 75
  6. 7
  7. 110
  8. 217.5
  9. 3
  10. 104
  11. 77.5
  12. 15
  13. 7.1
  14. 123
  15. 61.5
  16. 420
  17. 2.7
  18. 50
  19. 6
  20. 79
  21. 40.5
  22. 9.5
  23. 37.5
  24. 16.5
  25. 53
  26. 104
  27. 142
  28. 250
  29. 2.5
  30. 115
  31. 105
  32. 48
  33. 37.5
  34. 12
  35. 7.9
  36. 156
  37. 5.4
  38. 112
  39. 8
  40. 46.5

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