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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 936 · 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. 1.25% of 120 =
  2. 2.1% of 350 =
  3. 3.15% of 590 =
  4. 4.5% of 660 =
  5. 5.5% of 330 =
  6. 6.5% of 30 =
  7. 7.20% of 700 =
  8. 8.25% of 890 =
  9. 9.5% of 880 =
  10. 10.15% of 790 =
  11. 11.50% of 440 =
  12. 12.50% of 450 =
  13. 13.25% of 20 =
  14. 14.20% of 870 =
  15. 15.5% of 240 =
  16. 16.25% of 100 =
  17. 17.5% of 740 =
  18. 18.15% of 70 =
  19. 19.50% of 180 =
  20. 20.1% of 40 =
  21. 21.1% of 430 =
  22. 22.5% of 490 =
  23. 23.10% of 850 =
  24. 24.10% of 800 =
  25. 25.50% of 570 =
  26. 26.50% of 880 =
  27. 27.20% of 490 =
  28. 28.15% of 430 =
  29. 29.25% of 610 =
  30. 30.25% of 600 =
  31. 31.1% of 200 =
  32. 32.10% of 330 =
  33. 33.20% of 870 =
  34. 34.15% of 180 =
  35. 35.10% of 440 =
  36. 36.50% of 40 =
  37. 37.50% of 240 =
  38. 38.10% of 570 =
  39. 39.20% of 730 =
  40. 40.1% of 860 =

Answer key

  1. 30
  2. 3.5
  3. 88.5
  4. 33
  5. 16.5
  6. 1.5
  7. 140
  8. 222.5
  9. 44
  10. 118.5
  11. 220
  12. 225
  13. 5
  14. 174
  15. 12
  16. 25
  17. 37
  18. 10.5
  19. 90
  20. 0.4
  21. 4.3
  22. 24.5
  23. 85
  24. 80
  25. 285
  26. 440
  27. 98
  28. 64.5
  29. 152.5
  30. 150
  31. 2
  32. 33
  33. 174
  34. 27
  35. 44
  36. 20
  37. 120
  38. 57
  39. 146
  40. 8.6

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