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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 860 · 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 200 =
  2. 2.5% of 660 =
  3. 3.25% of 390 =
  4. 4.1% of 450 =
  5. 5.10% of 580 =
  6. 6.10% of 410 =
  7. 7.5% of 580 =
  8. 8.20% of 770 =
  9. 9.25% of 610 =
  10. 10.20% of 490 =
  11. 11.25% of 370 =
  12. 12.50% of 640 =
  13. 13.15% of 730 =
  14. 14.5% of 590 =
  15. 15.15% of 640 =
  16. 16.5% of 490 =
  17. 17.20% of 340 =
  18. 18.10% of 140 =
  19. 19.10% of 540 =
  20. 20.50% of 840 =
  21. 21.20% of 710 =
  22. 22.5% of 470 =
  23. 23.1% of 480 =
  24. 24.1% of 640 =
  25. 25.1% of 890 =
  26. 26.20% of 70 =
  27. 27.15% of 820 =
  28. 28.5% of 300 =
  29. 29.10% of 630 =
  30. 30.20% of 90 =
  31. 31.10% of 70 =
  32. 32.50% of 130 =
  33. 33.50% of 390 =
  34. 34.10% of 110 =
  35. 35.10% of 150 =
  36. 36.50% of 780 =
  37. 37.20% of 500 =
  38. 38.20% of 60 =
  39. 39.50% of 580 =
  40. 40.10% of 770 =

Answer key

  1. 10
  2. 33
  3. 97.5
  4. 4.5
  5. 58
  6. 41
  7. 29
  8. 154
  9. 152.5
  10. 98
  11. 92.5
  12. 320
  13. 109.5
  14. 29.5
  15. 96
  16. 24.5
  17. 68
  18. 14
  19. 54
  20. 420
  21. 142
  22. 23.5
  23. 4.8
  24. 6.4
  25. 8.9
  26. 14
  27. 123
  28. 15
  29. 63
  30. 18
  31. 7
  32. 65
  33. 195
  34. 11
  35. 15
  36. 390
  37. 100
  38. 12
  39. 290
  40. 77

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