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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 400 · 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. 1.1% of 260 =
  2. 2.25% of 360 =
  3. 3.15% of 870 =
  4. 4.1% of 830 =
  5. 5.5% of 730 =
  6. 6.5% of 250 =
  7. 7.1% of 720 =
  8. 8.10% of 40 =
  9. 9.5% of 900 =
  10. 10.10% of 670 =
  11. 11.1% of 400 =
  12. 12.10% of 130 =
  13. 13.15% of 310 =
  14. 14.50% of 630 =
  15. 15.50% of 220 =
  16. 16.1% of 280 =
  17. 17.5% of 720 =
  18. 18.20% of 150 =
  19. 19.1% of 290 =
  20. 20.10% of 600 =
  21. 21.1% of 750 =
  22. 22.5% of 560 =
  23. 23.15% of 470 =
  24. 24.5% of 750 =
  25. 25.1% of 510 =
  26. 26.25% of 130 =
  27. 27.5% of 150 =
  28. 28.25% of 110 =
  29. 29.25% of 350 =
  30. 30.50% of 770 =
  31. 31.5% of 270 =
  32. 32.20% of 370 =
  33. 33.50% of 450 =
  34. 34.5% of 270 =
  35. 35.25% of 420 =
  36. 36.15% of 260 =
  37. 37.25% of 60 =
  38. 38.50% of 820 =
  39. 39.10% of 100 =
  40. 40.10% of 620 =

Answer key

  1. 2.6
  2. 90
  3. 130.5
  4. 8.3
  5. 36.5
  6. 12.5
  7. 7.2
  8. 4
  9. 45
  10. 67
  11. 4
  12. 13
  13. 46.5
  14. 315
  15. 110
  16. 2.8
  17. 36
  18. 30
  19. 2.9
  20. 60
  21. 7.5
  22. 28
  23. 70.5
  24. 37.5
  25. 5.1
  26. 32.5
  27. 7.5
  28. 27.5
  29. 87.5
  30. 385
  31. 13.5
  32. 74
  33. 225
  34. 13.5
  35. 105
  36. 39
  37. 15
  38. 410
  39. 10
  40. 62

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