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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 979 · 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. 1.20% of 810 =
  2. 2.25% of 60 =
  3. 3.15% of 310 =
  4. 4.5% of 690 =
  5. 5.10% of 160 =
  6. 6.15% of 520 =
  7. 7.10% of 530 =
  8. 8.20% of 280 =
  9. 9.25% of 60 =
  10. 10.50% of 60 =
  11. 11.5% of 520 =
  12. 12.20% of 90 =
  13. 13.25% of 300 =
  14. 14.10% of 830 =
  15. 15.50% of 740 =
  16. 16.10% of 590 =
  17. 17.50% of 490 =
  18. 18.20% of 250 =
  19. 19.50% of 570 =
  20. 20.25% of 30 =
  21. 21.10% of 110 =
  22. 22.50% of 540 =
  23. 23.50% of 890 =
  24. 24.5% of 30 =
  25. 25.50% of 660 =
  26. 26.25% of 880 =
  27. 27.1% of 900 =
  28. 28.50% of 290 =
  29. 29.15% of 860 =
  30. 30.20% of 810 =
  31. 31.50% of 280 =
  32. 32.20% of 470 =
  33. 33.15% of 720 =
  34. 34.50% of 50 =
  35. 35.20% of 360 =
  36. 36.25% of 60 =
  37. 37.15% of 260 =
  38. 38.50% of 110 =
  39. 39.5% of 880 =
  40. 40.10% of 820 =

Answer key

  1. 162
  2. 15
  3. 46.5
  4. 34.5
  5. 16
  6. 78
  7. 53
  8. 56
  9. 15
  10. 30
  11. 26
  12. 18
  13. 75
  14. 83
  15. 370
  16. 59
  17. 245
  18. 50
  19. 285
  20. 7.5
  21. 11
  22. 270
  23. 445
  24. 1.5
  25. 330
  26. 220
  27. 9
  28. 145
  29. 129
  30. 162
  31. 140
  32. 94
  33. 108
  34. 25
  35. 72
  36. 15
  37. 39
  38. 55
  39. 44
  40. 82

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