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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 164 · 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. 1.25% of 150 =
  2. 2.1% of 50 =
  3. 3.10% of 70 =
  4. 4.20% of 20 =
  5. 5.20% of 210 =
  6. 6.25% of 30 =
  7. 7.20% of 860 =
  8. 8.1% of 370 =
  9. 9.10% of 280 =
  10. 10.50% of 710 =
  11. 11.20% of 610 =
  12. 12.15% of 300 =
  13. 13.10% of 210 =
  14. 14.20% of 850 =
  15. 15.5% of 280 =
  16. 16.10% of 140 =
  17. 17.25% of 340 =
  18. 18.20% of 800 =
  19. 19.20% of 460 =
  20. 20.10% of 20 =
  21. 21.20% of 120 =
  22. 22.1% of 440 =
  23. 23.20% of 700 =
  24. 24.20% of 250 =
  25. 25.10% of 70 =
  26. 26.10% of 40 =
  27. 27.1% of 50 =
  28. 28.50% of 860 =
  29. 29.5% of 600 =
  30. 30.1% of 20 =
  31. 31.5% of 380 =
  32. 32.5% of 40 =
  33. 33.10% of 540 =
  34. 34.10% of 740 =
  35. 35.15% of 290 =
  36. 36.10% of 270 =
  37. 37.15% of 380 =
  38. 38.1% of 550 =
  39. 39.25% of 780 =
  40. 40.50% of 810 =

Answer key

  1. 37.5
  2. 0.5
  3. 7
  4. 4
  5. 42
  6. 7.5
  7. 172
  8. 3.7
  9. 28
  10. 355
  11. 122
  12. 45
  13. 21
  14. 170
  15. 14
  16. 14
  17. 85
  18. 160
  19. 92
  20. 2
  21. 24
  22. 4.4
  23. 140
  24. 50
  25. 7
  26. 4
  27. 0.5
  28. 430
  29. 30
  30. 0.2
  31. 19
  32. 2
  33. 54
  34. 74
  35. 43.5
  36. 27
  37. 57
  38. 5.5
  39. 195
  40. 405

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