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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 978 · 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. 1.10% of 640 =
  2. 2.15% of 410 =
  3. 3.1% of 140 =
  4. 4.1% of 730 =
  5. 5.50% of 210 =
  6. 6.10% of 720 =
  7. 7.25% of 750 =
  8. 8.50% of 220 =
  9. 9.5% of 610 =
  10. 10.50% of 730 =
  11. 11.20% of 390 =
  12. 12.10% of 360 =
  13. 13.50% of 240 =
  14. 14.50% of 520 =
  15. 15.1% of 200 =
  16. 16.10% of 360 =
  17. 17.15% of 850 =
  18. 18.10% of 350 =
  19. 19.10% of 490 =
  20. 20.25% of 270 =
  21. 21.1% of 410 =
  22. 22.20% of 160 =
  23. 23.10% of 630 =
  24. 24.1% of 860 =
  25. 25.10% of 30 =
  26. 26.10% of 460 =
  27. 27.10% of 810 =
  28. 28.25% of 610 =
  29. 29.15% of 560 =
  30. 30.10% of 810 =
  31. 31.25% of 400 =
  32. 32.1% of 800 =
  33. 33.10% of 30 =
  34. 34.25% of 590 =
  35. 35.50% of 710 =
  36. 36.10% of 590 =
  37. 37.50% of 840 =
  38. 38.25% of 430 =
  39. 39.20% of 490 =
  40. 40.25% of 830 =

Answer key

  1. 64
  2. 61.5
  3. 1.4
  4. 7.3
  5. 105
  6. 72
  7. 187.5
  8. 110
  9. 30.5
  10. 365
  11. 78
  12. 36
  13. 120
  14. 260
  15. 2
  16. 36
  17. 127.5
  18. 35
  19. 49
  20. 67.5
  21. 4.1
  22. 32
  23. 63
  24. 8.6
  25. 3
  26. 46
  27. 81
  28. 152.5
  29. 84
  30. 81
  31. 100
  32. 8
  33. 3
  34. 147.5
  35. 355
  36. 59
  37. 420
  38. 107.5
  39. 98
  40. 207.5

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