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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 415 · 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. 1.20% of 580 =
  2. 2.5% of 270 =
  3. 3.5% of 800 =
  4. 4.10% of 820 =
  5. 5.20% of 630 =
  6. 6.10% of 260 =
  7. 7.20% of 710 =
  8. 8.5% of 830 =
  9. 9.25% of 730 =
  10. 10.15% of 780 =
  11. 11.50% of 70 =
  12. 12.10% of 520 =
  13. 13.1% of 750 =
  14. 14.50% of 890 =
  15. 15.50% of 840 =
  16. 16.50% of 150 =
  17. 17.5% of 70 =
  18. 18.25% of 310 =
  19. 19.50% of 740 =
  20. 20.25% of 320 =
  21. 21.10% of 730 =
  22. 22.15% of 780 =
  23. 23.20% of 830 =
  24. 24.10% of 860 =
  25. 25.1% of 400 =
  26. 26.10% of 480 =
  27. 27.25% of 640 =
  28. 28.10% of 90 =
  29. 29.5% of 890 =
  30. 30.1% of 790 =
  31. 31.50% of 810 =
  32. 32.25% of 240 =
  33. 33.10% of 600 =
  34. 34.5% of 640 =
  35. 35.1% of 640 =
  36. 36.1% of 230 =
  37. 37.50% of 810 =
  38. 38.50% of 70 =
  39. 39.50% of 90 =
  40. 40.1% of 850 =

Answer key

  1. 116
  2. 13.5
  3. 40
  4. 82
  5. 126
  6. 26
  7. 142
  8. 41.5
  9. 182.5
  10. 117
  11. 35
  12. 52
  13. 7.5
  14. 445
  15. 420
  16. 75
  17. 3.5
  18. 77.5
  19. 370
  20. 80
  21. 73
  22. 117
  23. 166
  24. 86
  25. 4
  26. 48
  27. 160
  28. 9
  29. 44.5
  30. 7.9
  31. 405
  32. 60
  33. 60
  34. 32
  35. 6.4
  36. 2.3
  37. 405
  38. 35
  39. 45
  40. 8.5

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