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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 117 · 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 170 =
  2. 2.10% of 420 =
  3. 3.1% of 170 =
  4. 4.5% of 330 =
  5. 5.10% of 630 =
  6. 6.25% of 900 =
  7. 7.5% of 270 =
  8. 8.20% of 720 =
  9. 9.20% of 290 =
  10. 10.20% of 230 =
  11. 11.1% of 650 =
  12. 12.1% of 550 =
  13. 13.1% of 340 =
  14. 14.15% of 200 =
  15. 15.20% of 140 =
  16. 16.10% of 30 =
  17. 17.5% of 460 =
  18. 18.15% of 820 =
  19. 19.20% of 30 =
  20. 20.10% of 500 =
  21. 21.20% of 120 =
  22. 22.5% of 780 =
  23. 23.20% of 230 =
  24. 24.50% of 660 =
  25. 25.5% of 390 =
  26. 26.20% of 140 =
  27. 27.1% of 200 =
  28. 28.20% of 850 =
  29. 29.25% of 550 =
  30. 30.10% of 390 =
  31. 31.5% of 40 =
  32. 32.20% of 460 =
  33. 33.5% of 30 =
  34. 34.10% of 440 =
  35. 35.10% of 830 =
  36. 36.15% of 520 =
  37. 37.10% of 530 =
  38. 38.50% of 800 =
  39. 39.25% of 780 =
  40. 40.50% of 520 =

Answer key

  1. 42.5
  2. 42
  3. 1.7
  4. 16.5
  5. 63
  6. 225
  7. 13.5
  8. 144
  9. 58
  10. 46
  11. 6.5
  12. 5.5
  13. 3.4
  14. 30
  15. 28
  16. 3
  17. 23
  18. 123
  19. 6
  20. 50
  21. 24
  22. 39
  23. 46
  24. 330
  25. 19.5
  26. 28
  27. 2
  28. 170
  29. 137.5
  30. 39
  31. 2
  32. 92
  33. 1.5
  34. 44
  35. 83
  36. 78
  37. 53
  38. 400
  39. 195
  40. 260

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