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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 698 · 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 850 =
  2. 2.15% of 470 =
  3. 3.50% of 640 =
  4. 4.5% of 450 =
  5. 5.5% of 820 =
  6. 6.25% of 280 =
  7. 7.20% of 70 =
  8. 8.50% of 130 =
  9. 9.15% of 810 =
  10. 10.50% of 600 =
  11. 11.10% of 120 =
  12. 12.5% of 460 =
  13. 13.25% of 870 =
  14. 14.5% of 210 =
  15. 15.20% of 440 =
  16. 16.20% of 360 =
  17. 17.10% of 70 =
  18. 18.25% of 860 =
  19. 19.10% of 790 =
  20. 20.10% of 60 =
  21. 21.25% of 140 =
  22. 22.15% of 640 =
  23. 23.25% of 210 =
  24. 24.20% of 510 =
  25. 25.50% of 110 =
  26. 26.5% of 130 =
  27. 27.15% of 840 =
  28. 28.25% of 280 =
  29. 29.25% of 270 =
  30. 30.1% of 480 =
  31. 31.25% of 450 =
  32. 32.5% of 50 =
  33. 33.15% of 160 =
  34. 34.5% of 210 =
  35. 35.10% of 550 =
  36. 36.1% of 80 =
  37. 37.5% of 900 =
  38. 38.15% of 210 =
  39. 39.15% of 340 =
  40. 40.10% of 340 =

Answer key

  1. 85
  2. 70.5
  3. 320
  4. 22.5
  5. 41
  6. 70
  7. 14
  8. 65
  9. 121.5
  10. 300
  11. 12
  12. 23
  13. 217.5
  14. 10.5
  15. 88
  16. 72
  17. 7
  18. 215
  19. 79
  20. 6
  21. 35
  22. 96
  23. 52.5
  24. 102
  25. 55
  26. 6.5
  27. 126
  28. 70
  29. 67.5
  30. 4.8
  31. 112.5
  32. 2.5
  33. 24
  34. 10.5
  35. 55
  36. 0.8
  37. 45
  38. 31.5
  39. 51
  40. 34

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