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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 551 · 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 650 =
  2. 2.1% of 260 =
  3. 3.1% of 690 =
  4. 4.5% of 270 =
  5. 5.1% of 890 =
  6. 6.10% of 610 =
  7. 7.1% of 40 =
  8. 8.1% of 340 =
  9. 9.10% of 570 =
  10. 10.15% of 480 =
  11. 11.50% of 280 =
  12. 12.15% of 620 =
  13. 13.10% of 280 =
  14. 14.20% of 370 =
  15. 15.1% of 530 =
  16. 16.1% of 600 =
  17. 17.5% of 630 =
  18. 18.20% of 470 =
  19. 19.5% of 70 =
  20. 20.20% of 530 =
  21. 21.25% of 110 =
  22. 22.10% of 750 =
  23. 23.50% of 440 =
  24. 24.25% of 140 =
  25. 25.15% of 770 =
  26. 26.15% of 460 =
  27. 27.25% of 70 =
  28. 28.25% of 520 =
  29. 29.50% of 800 =
  30. 30.5% of 460 =
  31. 31.10% of 680 =
  32. 32.5% of 420 =
  33. 33.20% of 710 =
  34. 34.5% of 880 =
  35. 35.25% of 760 =
  36. 36.50% of 760 =
  37. 37.50% of 580 =
  38. 38.10% of 670 =
  39. 39.25% of 260 =
  40. 40.15% of 870 =

Answer key

  1. 97.5
  2. 2.6
  3. 6.9
  4. 13.5
  5. 8.9
  6. 61
  7. 0.4
  8. 3.4
  9. 57
  10. 72
  11. 140
  12. 93
  13. 28
  14. 74
  15. 5.3
  16. 6
  17. 31.5
  18. 94
  19. 3.5
  20. 106
  21. 27.5
  22. 75
  23. 220
  24. 35
  25. 115.5
  26. 69
  27. 17.5
  28. 130
  29. 400
  30. 23
  31. 68
  32. 21
  33. 142
  34. 44
  35. 190
  36. 380
  37. 290
  38. 67
  39. 65
  40. 130.5

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