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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 859 · 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 590 =
  2. 2.1% of 730 =
  3. 3.5% of 440 =
  4. 4.50% of 470 =
  5. 5.10% of 450 =
  6. 6.25% of 270 =
  7. 7.25% of 120 =
  8. 8.20% of 520 =
  9. 9.50% of 720 =
  10. 10.25% of 360 =
  11. 11.5% of 520 =
  12. 12.1% of 660 =
  13. 13.10% of 850 =
  14. 14.20% of 300 =
  15. 15.5% of 860 =
  16. 16.1% of 30 =
  17. 17.10% of 740 =
  18. 18.10% of 820 =
  19. 19.25% of 250 =
  20. 20.15% of 820 =
  21. 21.1% of 830 =
  22. 22.50% of 620 =
  23. 23.20% of 300 =
  24. 24.10% of 670 =
  25. 25.25% of 100 =
  26. 26.5% of 280 =
  27. 27.1% of 360 =
  28. 28.5% of 50 =
  29. 29.10% of 270 =
  30. 30.50% of 50 =
  31. 31.25% of 70 =
  32. 32.1% of 250 =
  33. 33.50% of 40 =
  34. 34.5% of 460 =
  35. 35.20% of 700 =
  36. 36.5% of 300 =
  37. 37.20% of 570 =
  38. 38.50% of 90 =
  39. 39.50% of 490 =
  40. 40.10% of 230 =

Answer key

  1. 5.9
  2. 7.3
  3. 22
  4. 235
  5. 45
  6. 67.5
  7. 30
  8. 104
  9. 360
  10. 90
  11. 26
  12. 6.6
  13. 85
  14. 60
  15. 43
  16. 0.3
  17. 74
  18. 82
  19. 62.5
  20. 123
  21. 8.3
  22. 310
  23. 60
  24. 67
  25. 25
  26. 14
  27. 3.6
  28. 2.5
  29. 27
  30. 25
  31. 17.5
  32. 2.5
  33. 20
  34. 23
  35. 140
  36. 15
  37. 114
  38. 45
  39. 245
  40. 23

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