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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 853 · 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. 1.10% of 600 =
  2. 2.25% of 440 =
  3. 3.20% of 20 =
  4. 4.25% of 760 =
  5. 5.25% of 70 =
  6. 6.20% of 160 =
  7. 7.20% of 900 =
  8. 8.1% of 660 =
  9. 9.5% of 350 =
  10. 10.20% of 350 =
  11. 11.15% of 50 =
  12. 12.5% of 750 =
  13. 13.10% of 500 =
  14. 14.10% of 350 =
  15. 15.15% of 90 =
  16. 16.20% of 90 =
  17. 17.1% of 800 =
  18. 18.20% of 80 =
  19. 19.50% of 590 =
  20. 20.1% of 660 =
  21. 21.50% of 30 =
  22. 22.50% of 400 =
  23. 23.10% of 590 =
  24. 24.10% of 40 =
  25. 25.5% of 500 =
  26. 26.20% of 350 =
  27. 27.10% of 60 =
  28. 28.25% of 30 =
  29. 29.10% of 50 =
  30. 30.50% of 150 =
  31. 31.50% of 450 =
  32. 32.10% of 900 =
  33. 33.25% of 690 =
  34. 34.50% of 360 =
  35. 35.5% of 160 =
  36. 36.5% of 430 =
  37. 37.10% of 190 =
  38. 38.5% of 490 =
  39. 39.50% of 550 =
  40. 40.5% of 370 =

Answer key

  1. 60
  2. 110
  3. 4
  4. 190
  5. 17.5
  6. 32
  7. 180
  8. 6.6
  9. 17.5
  10. 70
  11. 7.5
  12. 37.5
  13. 50
  14. 35
  15. 13.5
  16. 18
  17. 8
  18. 16
  19. 295
  20. 6.6
  21. 15
  22. 200
  23. 59
  24. 4
  25. 25
  26. 70
  27. 6
  28. 7.5
  29. 5
  30. 75
  31. 225
  32. 90
  33. 172.5
  34. 180
  35. 8
  36. 21.5
  37. 19
  38. 24.5
  39. 275
  40. 18.5

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