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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 498 · 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 610 =
  2. 2.5% of 780 =
  3. 3.20% of 310 =
  4. 4.5% of 210 =
  5. 5.1% of 670 =
  6. 6.20% of 470 =
  7. 7.25% of 490 =
  8. 8.5% of 740 =
  9. 9.20% of 70 =
  10. 10.10% of 250 =
  11. 11.50% of 430 =
  12. 12.50% of 170 =
  13. 13.10% of 40 =
  14. 14.25% of 890 =
  15. 15.20% of 640 =
  16. 16.10% of 110 =
  17. 17.5% of 250 =
  18. 18.15% of 540 =
  19. 19.10% of 410 =
  20. 20.25% of 790 =
  21. 21.50% of 900 =
  22. 22.20% of 130 =
  23. 23.1% of 830 =
  24. 24.5% of 560 =
  25. 25.15% of 560 =
  26. 26.1% of 480 =
  27. 27.15% of 850 =
  28. 28.1% of 170 =
  29. 29.1% of 160 =
  30. 30.50% of 790 =
  31. 31.10% of 310 =
  32. 32.5% of 570 =
  33. 33.5% of 810 =
  34. 34.50% of 780 =
  35. 35.1% of 690 =
  36. 36.50% of 580 =
  37. 37.20% of 190 =
  38. 38.15% of 20 =
  39. 39.20% of 460 =
  40. 40.1% of 450 =

Answer key

  1. 6.1
  2. 39
  3. 62
  4. 10.5
  5. 6.7
  6. 94
  7. 122.5
  8. 37
  9. 14
  10. 25
  11. 215
  12. 85
  13. 4
  14. 222.5
  15. 128
  16. 11
  17. 12.5
  18. 81
  19. 41
  20. 197.5
  21. 450
  22. 26
  23. 8.3
  24. 28
  25. 84
  26. 4.8
  27. 127.5
  28. 1.7
  29. 1.6
  30. 395
  31. 31
  32. 28.5
  33. 40.5
  34. 390
  35. 6.9
  36. 290
  37. 38
  38. 3
  39. 92
  40. 4.5

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