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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 381 · 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. 1.5% of 110 =
  2. 2.15% of 380 =
  3. 3.50% of 690 =
  4. 4.1% of 350 =
  5. 5.15% of 580 =
  6. 6.1% of 210 =
  7. 7.1% of 890 =
  8. 8.1% of 660 =
  9. 9.5% of 580 =
  10. 10.20% of 410 =
  11. 11.1% of 860 =
  12. 12.1% of 250 =
  13. 13.1% of 560 =
  14. 14.50% of 760 =
  15. 15.1% of 20 =
  16. 16.15% of 240 =
  17. 17.20% of 150 =
  18. 18.25% of 870 =
  19. 19.10% of 560 =
  20. 20.5% of 350 =
  21. 21.1% of 220 =
  22. 22.1% of 760 =
  23. 23.10% of 120 =
  24. 24.50% of 70 =
  25. 25.5% of 330 =
  26. 26.20% of 540 =
  27. 27.1% of 320 =
  28. 28.1% of 480 =
  29. 29.20% of 610 =
  30. 30.5% of 400 =
  31. 31.15% of 300 =
  32. 32.25% of 70 =
  33. 33.5% of 180 =
  34. 34.50% of 600 =
  35. 35.50% of 400 =
  36. 36.5% of 440 =
  37. 37.1% of 810 =
  38. 38.15% of 660 =
  39. 39.5% of 550 =
  40. 40.15% of 610 =

Answer key

  1. 5.5
  2. 57
  3. 345
  4. 3.5
  5. 87
  6. 2.1
  7. 8.9
  8. 6.6
  9. 29
  10. 82
  11. 8.6
  12. 2.5
  13. 5.6
  14. 380
  15. 0.2
  16. 36
  17. 30
  18. 217.5
  19. 56
  20. 17.5
  21. 2.2
  22. 7.6
  23. 12
  24. 35
  25. 16.5
  26. 108
  27. 3.2
  28. 4.8
  29. 122
  30. 20
  31. 45
  32. 17.5
  33. 9
  34. 300
  35. 200
  36. 22
  37. 8.1
  38. 99
  39. 27.5
  40. 91.5

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