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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 907 · 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. 1.50% of 660 =
  2. 2.1% of 290 =
  3. 3.25% of 200 =
  4. 4.20% of 210 =
  5. 5.5% of 170 =
  6. 6.10% of 870 =
  7. 7.5% of 800 =
  8. 8.1% of 600 =
  9. 9.5% of 770 =
  10. 10.5% of 370 =
  11. 11.5% of 400 =
  12. 12.10% of 30 =
  13. 13.1% of 500 =
  14. 14.10% of 730 =
  15. 15.1% of 470 =
  16. 16.25% of 420 =
  17. 17.1% of 670 =
  18. 18.50% of 480 =
  19. 19.50% of 730 =
  20. 20.1% of 540 =
  21. 21.50% of 840 =
  22. 22.20% of 410 =
  23. 23.15% of 490 =
  24. 24.25% of 160 =
  25. 25.5% of 50 =
  26. 26.1% of 200 =
  27. 27.5% of 630 =
  28. 28.5% of 670 =
  29. 29.10% of 90 =
  30. 30.50% of 540 =
  31. 31.10% of 210 =
  32. 32.5% of 210 =
  33. 33.5% of 80 =
  34. 34.5% of 130 =
  35. 35.15% of 860 =
  36. 36.10% of 580 =
  37. 37.25% of 340 =
  38. 38.50% of 20 =
  39. 39.15% of 740 =
  40. 40.10% of 340 =

Answer key

  1. 330
  2. 2.9
  3. 50
  4. 42
  5. 8.5
  6. 87
  7. 40
  8. 6
  9. 38.5
  10. 18.5
  11. 20
  12. 3
  13. 5
  14. 73
  15. 4.7
  16. 105
  17. 6.7
  18. 240
  19. 365
  20. 5.4
  21. 420
  22. 82
  23. 73.5
  24. 40
  25. 2.5
  26. 2
  27. 31.5
  28. 33.5
  29. 9
  30. 270
  31. 21
  32. 10.5
  33. 4
  34. 6.5
  35. 129
  36. 58
  37. 85
  38. 10
  39. 111
  40. 34

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