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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 894 · 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 390 =
  2. 2.10% of 730 =
  3. 3.50% of 430 =
  4. 4.1% of 550 =
  5. 5.15% of 80 =
  6. 6.20% of 880 =
  7. 7.10% of 30 =
  8. 8.1% of 280 =
  9. 9.1% of 820 =
  10. 10.25% of 830 =
  11. 11.10% of 760 =
  12. 12.15% of 100 =
  13. 13.10% of 60 =
  14. 14.10% of 50 =
  15. 15.15% of 320 =
  16. 16.25% of 140 =
  17. 17.15% of 420 =
  18. 18.20% of 160 =
  19. 19.5% of 420 =
  20. 20.20% of 40 =
  21. 21.10% of 590 =
  22. 22.20% of 60 =
  23. 23.20% of 250 =
  24. 24.20% of 720 =
  25. 25.10% of 120 =
  26. 26.20% of 150 =
  27. 27.5% of 280 =
  28. 28.15% of 740 =
  29. 29.15% of 350 =
  30. 30.10% of 770 =
  31. 31.50% of 20 =
  32. 32.15% of 380 =
  33. 33.10% of 890 =
  34. 34.20% of 670 =
  35. 35.50% of 720 =
  36. 36.5% of 540 =
  37. 37.5% of 110 =
  38. 38.25% of 610 =
  39. 39.10% of 700 =
  40. 40.50% of 90 =

Answer key

  1. 19.5
  2. 73
  3. 215
  4. 5.5
  5. 12
  6. 176
  7. 3
  8. 2.8
  9. 8.2
  10. 207.5
  11. 76
  12. 15
  13. 6
  14. 5
  15. 48
  16. 35
  17. 63
  18. 32
  19. 21
  20. 8
  21. 59
  22. 12
  23. 50
  24. 144
  25. 12
  26. 30
  27. 14
  28. 111
  29. 52.5
  30. 77
  31. 10
  32. 57
  33. 89
  34. 134
  35. 360
  36. 27
  37. 5.5
  38. 152.5
  39. 70
  40. 45

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