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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 873 · 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. 1.15% of 170 =
  2. 2.10% of 60 =
  3. 3.50% of 120 =
  4. 4.5% of 670 =
  5. 5.10% of 380 =
  6. 6.5% of 320 =
  7. 7.1% of 110 =
  8. 8.15% of 730 =
  9. 9.25% of 260 =
  10. 10.1% of 220 =
  11. 11.5% of 290 =
  12. 12.50% of 610 =
  13. 13.15% of 530 =
  14. 14.10% of 580 =
  15. 15.25% of 540 =
  16. 16.50% of 750 =
  17. 17.10% of 890 =
  18. 18.10% of 280 =
  19. 19.5% of 530 =
  20. 20.20% of 320 =
  21. 21.25% of 60 =
  22. 22.10% of 350 =
  23. 23.5% of 810 =
  24. 24.1% of 760 =
  25. 25.5% of 490 =
  26. 26.10% of 760 =
  27. 27.1% of 200 =
  28. 28.1% of 440 =
  29. 29.25% of 130 =
  30. 30.25% of 630 =
  31. 31.50% of 140 =
  32. 32.20% of 580 =
  33. 33.25% of 790 =
  34. 34.10% of 850 =
  35. 35.5% of 650 =
  36. 36.15% of 80 =
  37. 37.1% of 80 =
  38. 38.50% of 220 =
  39. 39.5% of 340 =
  40. 40.20% of 610 =

Answer key

  1. 25.5
  2. 6
  3. 60
  4. 33.5
  5. 38
  6. 16
  7. 1.1
  8. 109.5
  9. 65
  10. 2.2
  11. 14.5
  12. 305
  13. 79.5
  14. 58
  15. 135
  16. 375
  17. 89
  18. 28
  19. 26.5
  20. 64
  21. 15
  22. 35
  23. 40.5
  24. 7.6
  25. 24.5
  26. 76
  27. 2
  28. 4.4
  29. 32.5
  30. 157.5
  31. 70
  32. 116
  33. 197.5
  34. 85
  35. 32.5
  36. 12
  37. 0.8
  38. 110
  39. 17
  40. 122

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