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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 920 · 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 170 =
  2. 2.15% of 380 =
  3. 3.1% of 240 =
  4. 4.5% of 780 =
  5. 5.5% of 460 =
  6. 6.25% of 770 =
  7. 7.50% of 70 =
  8. 8.10% of 430 =
  9. 9.50% of 280 =
  10. 10.20% of 540 =
  11. 11.25% of 430 =
  12. 12.5% of 220 =
  13. 13.25% of 60 =
  14. 14.20% of 800 =
  15. 15.50% of 600 =
  16. 16.1% of 520 =
  17. 17.10% of 760 =
  18. 18.5% of 580 =
  19. 19.15% of 130 =
  20. 20.50% of 450 =
  21. 21.20% of 240 =
  22. 22.1% of 70 =
  23. 23.10% of 560 =
  24. 24.1% of 440 =
  25. 25.25% of 590 =
  26. 26.15% of 660 =
  27. 27.50% of 570 =
  28. 28.20% of 160 =
  29. 29.10% of 710 =
  30. 30.20% of 20 =
  31. 31.15% of 730 =
  32. 32.20% of 670 =
  33. 33.20% of 470 =
  34. 34.1% of 230 =
  35. 35.5% of 740 =
  36. 36.10% of 230 =
  37. 37.5% of 580 =
  38. 38.5% of 130 =
  39. 39.25% of 410 =
  40. 40.5% of 500 =

Answer key

  1. 42.5
  2. 57
  3. 2.4
  4. 39
  5. 23
  6. 192.5
  7. 35
  8. 43
  9. 140
  10. 108
  11. 107.5
  12. 11
  13. 15
  14. 160
  15. 300
  16. 5.2
  17. 76
  18. 29
  19. 19.5
  20. 225
  21. 48
  22. 0.7
  23. 56
  24. 4.4
  25. 147.5
  26. 99
  27. 285
  28. 32
  29. 71
  30. 4
  31. 109.5
  32. 134
  33. 94
  34. 2.3
  35. 37
  36. 23
  37. 29
  38. 6.5
  39. 102.5
  40. 25

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