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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 848 · 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. 1.15% of 170 =
  2. 2.25% of 860 =
  3. 3.15% of 820 =
  4. 4.10% of 510 =
  5. 5.1% of 520 =
  6. 6.20% of 850 =
  7. 7.25% of 460 =
  8. 8.5% of 220 =
  9. 9.20% of 570 =
  10. 10.50% of 420 =
  11. 11.5% of 240 =
  12. 12.10% of 830 =
  13. 13.5% of 60 =
  14. 14.20% of 700 =
  15. 15.15% of 460 =
  16. 16.50% of 480 =
  17. 17.25% of 460 =
  18. 18.25% of 250 =
  19. 19.25% of 580 =
  20. 20.1% of 890 =
  21. 21.20% of 510 =
  22. 22.20% of 440 =
  23. 23.20% of 210 =
  24. 24.50% of 800 =
  25. 25.50% of 600 =
  26. 26.1% of 760 =
  27. 27.5% of 740 =
  28. 28.15% of 200 =
  29. 29.1% of 520 =
  30. 30.5% of 500 =
  31. 31.25% of 820 =
  32. 32.5% of 240 =
  33. 33.15% of 40 =
  34. 34.20% of 750 =
  35. 35.25% of 770 =
  36. 36.25% of 140 =
  37. 37.15% of 260 =
  38. 38.25% of 160 =
  39. 39.15% of 720 =
  40. 40.15% of 850 =

Answer key

  1. 25.5
  2. 215
  3. 123
  4. 51
  5. 5.2
  6. 170
  7. 115
  8. 11
  9. 114
  10. 210
  11. 12
  12. 83
  13. 3
  14. 140
  15. 69
  16. 240
  17. 115
  18. 62.5
  19. 145
  20. 8.9
  21. 102
  22. 88
  23. 42
  24. 400
  25. 300
  26. 7.6
  27. 37
  28. 30
  29. 5.2
  30. 25
  31. 205
  32. 12
  33. 6
  34. 150
  35. 192.5
  36. 35
  37. 39
  38. 40
  39. 108
  40. 127.5

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