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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 866 · 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 350 =
  2. 2.25% of 350 =
  3. 3.1% of 410 =
  4. 4.50% of 540 =
  5. 5.5% of 30 =
  6. 6.1% of 670 =
  7. 7.5% of 110 =
  8. 8.20% of 160 =
  9. 9.15% of 890 =
  10. 10.1% of 630 =
  11. 11.25% of 510 =
  12. 12.20% of 150 =
  13. 13.25% of 720 =
  14. 14.25% of 190 =
  15. 15.10% of 570 =
  16. 16.15% of 560 =
  17. 17.20% of 480 =
  18. 18.50% of 810 =
  19. 19.10% of 280 =
  20. 20.5% of 870 =
  21. 21.1% of 880 =
  22. 22.50% of 250 =
  23. 23.5% of 780 =
  24. 24.25% of 670 =
  25. 25.5% of 610 =
  26. 26.20% of 570 =
  27. 27.20% of 480 =
  28. 28.5% of 120 =
  29. 29.25% of 270 =
  30. 30.5% of 490 =
  31. 31.10% of 200 =
  32. 32.20% of 260 =
  33. 33.10% of 720 =
  34. 34.15% of 130 =
  35. 35.1% of 590 =
  36. 36.10% of 220 =
  37. 37.10% of 160 =
  38. 38.10% of 100 =
  39. 39.20% of 190 =
  40. 40.1% of 220 =

Answer key

  1. 3.5
  2. 87.5
  3. 4.1
  4. 270
  5. 1.5
  6. 6.7
  7. 5.5
  8. 32
  9. 133.5
  10. 6.3
  11. 127.5
  12. 30
  13. 180
  14. 47.5
  15. 57
  16. 84
  17. 96
  18. 405
  19. 28
  20. 43.5
  21. 8.8
  22. 125
  23. 39
  24. 167.5
  25. 30.5
  26. 114
  27. 96
  28. 6
  29. 67.5
  30. 24.5
  31. 20
  32. 52
  33. 72
  34. 19.5
  35. 5.9
  36. 22
  37. 16
  38. 10
  39. 38
  40. 2.2

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