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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 913 · 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 350 =
  2. 2.15% of 290 =
  3. 3.1% of 20 =
  4. 4.5% of 240 =
  5. 5.10% of 590 =
  6. 6.25% of 600 =
  7. 7.20% of 620 =
  8. 8.5% of 430 =
  9. 9.50% of 640 =
  10. 10.15% of 600 =
  11. 11.5% of 160 =
  12. 12.10% of 900 =
  13. 13.25% of 40 =
  14. 14.5% of 200 =
  15. 15.10% of 820 =
  16. 16.10% of 670 =
  17. 17.20% of 730 =
  18. 18.15% of 80 =
  19. 19.20% of 160 =
  20. 20.10% of 220 =
  21. 21.25% of 140 =
  22. 22.15% of 800 =
  23. 23.1% of 350 =
  24. 24.10% of 830 =
  25. 25.15% of 200 =
  26. 26.25% of 290 =
  27. 27.5% of 150 =
  28. 28.5% of 200 =
  29. 29.25% of 670 =
  30. 30.50% of 130 =
  31. 31.50% of 480 =
  32. 32.50% of 750 =
  33. 33.20% of 440 =
  34. 34.25% of 430 =
  35. 35.15% of 340 =
  36. 36.20% of 490 =
  37. 37.5% of 350 =
  38. 38.5% of 200 =
  39. 39.10% of 240 =
  40. 40.15% of 730 =

Answer key

  1. 3.5
  2. 43.5
  3. 0.2
  4. 12
  5. 59
  6. 150
  7. 124
  8. 21.5
  9. 320
  10. 90
  11. 8
  12. 90
  13. 10
  14. 10
  15. 82
  16. 67
  17. 146
  18. 12
  19. 32
  20. 22
  21. 35
  22. 120
  23. 3.5
  24. 83
  25. 30
  26. 72.5
  27. 7.5
  28. 10
  29. 167.5
  30. 65
  31. 240
  32. 375
  33. 88
  34. 107.5
  35. 51
  36. 98
  37. 17.5
  38. 10
  39. 24
  40. 109.5

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