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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 850 · 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 580 =
  2. 2.25% of 420 =
  3. 3.1% of 740 =
  4. 4.50% of 50 =
  5. 5.5% of 190 =
  6. 6.15% of 560 =
  7. 7.50% of 750 =
  8. 8.1% of 760 =
  9. 9.5% of 220 =
  10. 10.15% of 60 =
  11. 11.50% of 740 =
  12. 12.1% of 190 =
  13. 13.10% of 870 =
  14. 14.10% of 180 =
  15. 15.5% of 150 =
  16. 16.10% of 810 =
  17. 17.10% of 280 =
  18. 18.5% of 250 =
  19. 19.20% of 730 =
  20. 20.25% of 150 =
  21. 21.15% of 300 =
  22. 22.20% of 80 =
  23. 23.50% of 790 =
  24. 24.1% of 510 =
  25. 25.10% of 780 =
  26. 26.5% of 110 =
  27. 27.1% of 890 =
  28. 28.20% of 640 =
  29. 29.10% of 200 =
  30. 30.20% of 420 =
  31. 31.1% of 260 =
  32. 32.15% of 300 =
  33. 33.10% of 790 =
  34. 34.5% of 190 =
  35. 35.25% of 180 =
  36. 36.5% of 210 =
  37. 37.25% of 480 =
  38. 38.1% of 560 =
  39. 39.25% of 420 =
  40. 40.25% of 540 =

Answer key

  1. 5.8
  2. 105
  3. 7.4
  4. 25
  5. 9.5
  6. 84
  7. 375
  8. 7.6
  9. 11
  10. 9
  11. 370
  12. 1.9
  13. 87
  14. 18
  15. 7.5
  16. 81
  17. 28
  18. 12.5
  19. 146
  20. 37.5
  21. 45
  22. 16
  23. 395
  24. 5.1
  25. 78
  26. 5.5
  27. 8.9
  28. 128
  29. 20
  30. 84
  31. 2.6
  32. 45
  33. 79
  34. 9.5
  35. 45
  36. 10.5
  37. 120
  38. 5.6
  39. 105
  40. 135

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