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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 256 · 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 630 =
  2. 2.5% of 690 =
  3. 3.10% of 790 =
  4. 4.25% of 370 =
  5. 5.15% of 780 =
  6. 6.15% of 580 =
  7. 7.10% of 90 =
  8. 8.50% of 80 =
  9. 9.25% of 420 =
  10. 10.15% of 740 =
  11. 11.25% of 490 =
  12. 12.15% of 70 =
  13. 13.10% of 270 =
  14. 14.15% of 210 =
  15. 15.25% of 530 =
  16. 16.20% of 150 =
  17. 17.10% of 540 =
  18. 18.20% of 560 =
  19. 19.15% of 870 =
  20. 20.50% of 600 =
  21. 21.20% of 250 =
  22. 22.15% of 690 =
  23. 23.5% of 240 =
  24. 24.15% of 650 =
  25. 25.50% of 800 =
  26. 26.10% of 60 =
  27. 27.25% of 20 =
  28. 28.10% of 170 =
  29. 29.50% of 690 =
  30. 30.25% of 760 =
  31. 31.50% of 210 =
  32. 32.20% of 760 =
  33. 33.50% of 130 =
  34. 34.25% of 700 =
  35. 35.5% of 700 =
  36. 36.15% of 660 =
  37. 37.20% of 330 =
  38. 38.10% of 830 =
  39. 39.25% of 850 =
  40. 40.20% of 470 =

Answer key

  1. 63
  2. 34.5
  3. 79
  4. 92.5
  5. 117
  6. 87
  7. 9
  8. 40
  9. 105
  10. 111
  11. 122.5
  12. 10.5
  13. 27
  14. 31.5
  15. 132.5
  16. 30
  17. 54
  18. 112
  19. 130.5
  20. 300
  21. 50
  22. 103.5
  23. 12
  24. 97.5
  25. 400
  26. 6
  27. 5
  28. 17
  29. 345
  30. 190
  31. 105
  32. 152
  33. 65
  34. 175
  35. 35
  36. 99
  37. 66
  38. 83
  39. 212.5
  40. 94

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