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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 238 · 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 80 =
  2. 2.1% of 580 =
  3. 3.15% of 290 =
  4. 4.15% of 430 =
  5. 5.25% of 480 =
  6. 6.25% of 810 =
  7. 7.25% of 460 =
  8. 8.5% of 250 =
  9. 9.5% of 770 =
  10. 10.5% of 700 =
  11. 11.20% of 890 =
  12. 12.1% of 690 =
  13. 13.15% of 190 =
  14. 14.5% of 660 =
  15. 15.50% of 100 =
  16. 16.1% of 60 =
  17. 17.1% of 630 =
  18. 18.50% of 280 =
  19. 19.25% of 580 =
  20. 20.5% of 380 =
  21. 21.25% of 470 =
  22. 22.25% of 170 =
  23. 23.5% of 170 =
  24. 24.10% of 450 =
  25. 25.50% of 870 =
  26. 26.10% of 700 =
  27. 27.20% of 670 =
  28. 28.50% of 250 =
  29. 29.1% of 450 =
  30. 30.20% of 590 =
  31. 31.15% of 30 =
  32. 32.10% of 790 =
  33. 33.5% of 60 =
  34. 34.1% of 30 =
  35. 35.10% of 670 =
  36. 36.1% of 660 =
  37. 37.5% of 480 =
  38. 38.10% of 780 =
  39. 39.25% of 870 =
  40. 40.50% of 640 =

Answer key

  1. 8
  2. 5.8
  3. 43.5
  4. 64.5
  5. 120
  6. 202.5
  7. 115
  8. 12.5
  9. 38.5
  10. 35
  11. 178
  12. 6.9
  13. 28.5
  14. 33
  15. 50
  16. 0.6
  17. 6.3
  18. 140
  19. 145
  20. 19
  21. 117.5
  22. 42.5
  23. 8.5
  24. 45
  25. 435
  26. 70
  27. 134
  28. 125
  29. 4.5
  30. 118
  31. 4.5
  32. 79
  33. 3
  34. 0.3
  35. 67
  36. 6.6
  37. 24
  38. 78
  39. 217.5
  40. 320

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