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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 223 · 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. 1.1% of 550 =
  2. 2.5% of 650 =
  3. 3.15% of 210 =
  4. 4.1% of 760 =
  5. 5.1% of 640 =
  6. 6.10% of 660 =
  7. 7.50% of 280 =
  8. 8.25% of 870 =
  9. 9.25% of 190 =
  10. 10.25% of 630 =
  11. 11.20% of 580 =
  12. 12.50% of 690 =
  13. 13.25% of 830 =
  14. 14.10% of 720 =
  15. 15.1% of 820 =
  16. 16.10% of 20 =
  17. 17.50% of 120 =
  18. 18.25% of 590 =
  19. 19.50% of 60 =
  20. 20.5% of 550 =
  21. 21.50% of 270 =
  22. 22.15% of 460 =
  23. 23.10% of 80 =
  24. 24.10% of 60 =
  25. 25.10% of 480 =
  26. 26.25% of 240 =
  27. 27.25% of 340 =
  28. 28.25% of 200 =
  29. 29.10% of 590 =
  30. 30.50% of 790 =
  31. 31.25% of 900 =
  32. 32.20% of 180 =
  33. 33.25% of 420 =
  34. 34.15% of 640 =
  35. 35.1% of 470 =
  36. 36.20% of 310 =
  37. 37.25% of 40 =
  38. 38.50% of 400 =
  39. 39.15% of 750 =
  40. 40.5% of 40 =

Answer key

  1. 5.5
  2. 32.5
  3. 31.5
  4. 7.6
  5. 6.4
  6. 66
  7. 140
  8. 217.5
  9. 47.5
  10. 157.5
  11. 116
  12. 345
  13. 207.5
  14. 72
  15. 8.2
  16. 2
  17. 60
  18. 147.5
  19. 30
  20. 27.5
  21. 135
  22. 69
  23. 8
  24. 6
  25. 48
  26. 60
  27. 85
  28. 50
  29. 59
  30. 395
  31. 225
  32. 36
  33. 105
  34. 96
  35. 4.7
  36. 62
  37. 10
  38. 200
  39. 112.5
  40. 2

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