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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 946 · 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 550 =
  2. 2.5% of 120 =
  3. 3.25% of 180 =
  4. 4.15% of 510 =
  5. 5.15% of 530 =
  6. 6.5% of 840 =
  7. 7.5% of 30 =
  8. 8.50% of 880 =
  9. 9.25% of 80 =
  10. 10.15% of 450 =
  11. 11.25% of 410 =
  12. 12.10% of 870 =
  13. 13.10% of 400 =
  14. 14.25% of 560 =
  15. 15.10% of 590 =
  16. 16.10% of 890 =
  17. 17.5% of 30 =
  18. 18.50% of 370 =
  19. 19.20% of 200 =
  20. 20.5% of 280 =
  21. 21.25% of 180 =
  22. 22.20% of 200 =
  23. 23.25% of 110 =
  24. 24.1% of 370 =
  25. 25.50% of 830 =
  26. 26.5% of 580 =
  27. 27.25% of 390 =
  28. 28.20% of 610 =
  29. 29.25% of 660 =
  30. 30.25% of 750 =
  31. 31.10% of 60 =
  32. 32.20% of 440 =
  33. 33.1% of 730 =
  34. 34.20% of 660 =
  35. 35.50% of 80 =
  36. 36.25% of 740 =
  37. 37.5% of 520 =
  38. 38.10% of 50 =
  39. 39.20% of 410 =
  40. 40.10% of 620 =

Answer key

  1. 137.5
  2. 6
  3. 45
  4. 76.5
  5. 79.5
  6. 42
  7. 1.5
  8. 440
  9. 20
  10. 67.5
  11. 102.5
  12. 87
  13. 40
  14. 140
  15. 59
  16. 89
  17. 1.5
  18. 185
  19. 40
  20. 14
  21. 45
  22. 40
  23. 27.5
  24. 3.7
  25. 415
  26. 29
  27. 97.5
  28. 122
  29. 165
  30. 187.5
  31. 6
  32. 88
  33. 7.3
  34. 132
  35. 40
  36. 185
  37. 26
  38. 5
  39. 82
  40. 62

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