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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 384 · 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 670 =
  2. 2.1% of 640 =
  3. 3.25% of 470 =
  4. 4.25% of 230 =
  5. 5.20% of 890 =
  6. 6.10% of 30 =
  7. 7.1% of 550 =
  8. 8.15% of 800 =
  9. 9.25% of 440 =
  10. 10.5% of 640 =
  11. 11.15% of 370 =
  12. 12.5% of 870 =
  13. 13.50% of 120 =
  14. 14.50% of 330 =
  15. 15.20% of 780 =
  16. 16.25% of 120 =
  17. 17.50% of 800 =
  18. 18.1% of 410 =
  19. 19.15% of 190 =
  20. 20.15% of 770 =
  21. 21.25% of 410 =
  22. 22.50% of 530 =
  23. 23.50% of 480 =
  24. 24.25% of 130 =
  25. 25.10% of 50 =
  26. 26.15% of 230 =
  27. 27.50% of 400 =
  28. 28.5% of 510 =
  29. 29.10% of 700 =
  30. 30.20% of 540 =
  31. 31.20% of 840 =
  32. 32.5% of 700 =
  33. 33.20% of 650 =
  34. 34.10% of 170 =
  35. 35.5% of 150 =
  36. 36.50% of 750 =
  37. 37.5% of 890 =
  38. 38.20% of 560 =
  39. 39.25% of 360 =
  40. 40.1% of 660 =

Answer key

  1. 6.7
  2. 6.4
  3. 117.5
  4. 57.5
  5. 178
  6. 3
  7. 5.5
  8. 120
  9. 110
  10. 32
  11. 55.5
  12. 43.5
  13. 60
  14. 165
  15. 156
  16. 30
  17. 400
  18. 4.1
  19. 28.5
  20. 115.5
  21. 102.5
  22. 265
  23. 240
  24. 32.5
  25. 5
  26. 34.5
  27. 200
  28. 25.5
  29. 70
  30. 108
  31. 168
  32. 35
  33. 130
  34. 17
  35. 7.5
  36. 375
  37. 44.5
  38. 112
  39. 90
  40. 6.6

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