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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 840 · 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 900 =
  2. 2.50% of 860 =
  3. 3.25% of 70 =
  4. 4.1% of 850 =
  5. 5.50% of 170 =
  6. 6.1% of 140 =
  7. 7.5% of 30 =
  8. 8.20% of 440 =
  9. 9.25% of 890 =
  10. 10.25% of 390 =
  11. 11.10% of 470 =
  12. 12.20% of 50 =
  13. 13.25% of 400 =
  14. 14.25% of 660 =
  15. 15.50% of 310 =
  16. 16.10% of 90 =
  17. 17.50% of 110 =
  18. 18.20% of 750 =
  19. 19.50% of 250 =
  20. 20.1% of 630 =
  21. 21.1% of 880 =
  22. 22.20% of 30 =
  23. 23.20% of 530 =
  24. 24.10% of 130 =
  25. 25.20% of 120 =
  26. 26.25% of 670 =
  27. 27.20% of 260 =
  28. 28.20% of 730 =
  29. 29.25% of 50 =
  30. 30.15% of 180 =
  31. 31.25% of 900 =
  32. 32.5% of 430 =
  33. 33.50% of 290 =
  34. 34.5% of 490 =
  35. 35.15% of 270 =
  36. 36.20% of 600 =
  37. 37.5% of 120 =
  38. 38.10% of 600 =
  39. 39.20% of 300 =
  40. 40.1% of 490 =

Answer key

  1. 9
  2. 430
  3. 17.5
  4. 8.5
  5. 85
  6. 1.4
  7. 1.5
  8. 88
  9. 222.5
  10. 97.5
  11. 47
  12. 10
  13. 100
  14. 165
  15. 155
  16. 9
  17. 55
  18. 150
  19. 125
  20. 6.3
  21. 8.8
  22. 6
  23. 106
  24. 13
  25. 24
  26. 167.5
  27. 52
  28. 146
  29. 12.5
  30. 27
  31. 225
  32. 21.5
  33. 145
  34. 24.5
  35. 40.5
  36. 120
  37. 6
  38. 60
  39. 60
  40. 4.9

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