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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 208 · 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 290 =
  2. 2.15% of 460 =
  3. 3.5% of 360 =
  4. 4.1% of 520 =
  5. 5.20% of 420 =
  6. 6.10% of 760 =
  7. 7.1% of 770 =
  8. 8.25% of 80 =
  9. 9.10% of 140 =
  10. 10.1% of 800 =
  11. 11.25% of 350 =
  12. 12.5% of 180 =
  13. 13.5% of 840 =
  14. 14.10% of 900 =
  15. 15.10% of 710 =
  16. 16.20% of 80 =
  17. 17.5% of 750 =
  18. 18.10% of 380 =
  19. 19.1% of 380 =
  20. 20.5% of 470 =
  21. 21.25% of 310 =
  22. 22.15% of 750 =
  23. 23.25% of 250 =
  24. 24.5% of 360 =
  25. 25.10% of 550 =
  26. 26.10% of 800 =
  27. 27.5% of 310 =
  28. 28.10% of 820 =
  29. 29.10% of 470 =
  30. 30.20% of 730 =
  31. 31.50% of 40 =
  32. 32.15% of 310 =
  33. 33.25% of 510 =
  34. 34.1% of 170 =
  35. 35.25% of 430 =
  36. 36.15% of 210 =
  37. 37.5% of 600 =
  38. 38.1% of 250 =
  39. 39.1% of 680 =
  40. 40.50% of 850 =

Answer key

  1. 14.5
  2. 69
  3. 18
  4. 5.2
  5. 84
  6. 76
  7. 7.7
  8. 20
  9. 14
  10. 8
  11. 87.5
  12. 9
  13. 42
  14. 90
  15. 71
  16. 16
  17. 37.5
  18. 38
  19. 3.8
  20. 23.5
  21. 77.5
  22. 112.5
  23. 62.5
  24. 18
  25. 55
  26. 80
  27. 15.5
  28. 82
  29. 47
  30. 146
  31. 20
  32. 46.5
  33. 127.5
  34. 1.7
  35. 107.5
  36. 31.5
  37. 30
  38. 2.5
  39. 6.8
  40. 425

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