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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 847 · 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 320 =
  2. 2.25% of 140 =
  3. 3.50% of 210 =
  4. 4.5% of 690 =
  5. 5.15% of 850 =
  6. 6.20% of 410 =
  7. 7.1% of 90 =
  8. 8.20% of 40 =
  9. 9.10% of 690 =
  10. 10.50% of 700 =
  11. 11.20% of 790 =
  12. 12.15% of 30 =
  13. 13.15% of 820 =
  14. 14.50% of 260 =
  15. 15.20% of 610 =
  16. 16.10% of 280 =
  17. 17.15% of 100 =
  18. 18.10% of 750 =
  19. 19.15% of 730 =
  20. 20.50% of 650 =
  21. 21.20% of 280 =
  22. 22.15% of 550 =
  23. 23.25% of 230 =
  24. 24.5% of 880 =
  25. 25.50% of 790 =
  26. 26.10% of 780 =
  27. 27.50% of 860 =
  28. 28.1% of 640 =
  29. 29.20% of 520 =
  30. 30.50% of 260 =
  31. 31.1% of 470 =
  32. 32.5% of 530 =
  33. 33.50% of 360 =
  34. 34.1% of 150 =
  35. 35.5% of 420 =
  36. 36.10% of 870 =
  37. 37.5% of 30 =
  38. 38.5% of 850 =
  39. 39.50% of 660 =
  40. 40.5% of 410 =

Answer key

  1. 3.2
  2. 35
  3. 105
  4. 34.5
  5. 127.5
  6. 82
  7. 0.9
  8. 8
  9. 69
  10. 350
  11. 158
  12. 4.5
  13. 123
  14. 130
  15. 122
  16. 28
  17. 15
  18. 75
  19. 109.5
  20. 325
  21. 56
  22. 82.5
  23. 57.5
  24. 44
  25. 395
  26. 78
  27. 430
  28. 6.4
  29. 104
  30. 130
  31. 4.7
  32. 26.5
  33. 180
  34. 1.5
  35. 21
  36. 87
  37. 1.5
  38. 42.5
  39. 330
  40. 20.5

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