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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 896 · 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. 1.50% of 120 =
  2. 2.1% of 350 =
  3. 3.1% of 710 =
  4. 4.50% of 100 =
  5. 5.20% of 550 =
  6. 6.20% of 640 =
  7. 7.10% of 160 =
  8. 8.15% of 250 =
  9. 9.5% of 410 =
  10. 10.15% of 400 =
  11. 11.15% of 880 =
  12. 12.5% of 330 =
  13. 13.20% of 670 =
  14. 14.25% of 690 =
  15. 15.10% of 270 =
  16. 16.15% of 720 =
  17. 17.25% of 110 =
  18. 18.25% of 70 =
  19. 19.20% of 140 =
  20. 20.10% of 380 =
  21. 21.15% of 210 =
  22. 22.10% of 740 =
  23. 23.5% of 210 =
  24. 24.20% of 690 =
  25. 25.10% of 680 =
  26. 26.20% of 560 =
  27. 27.10% of 110 =
  28. 28.5% of 120 =
  29. 29.15% of 840 =
  30. 30.15% of 210 =
  31. 31.1% of 750 =
  32. 32.50% of 590 =
  33. 33.25% of 270 =
  34. 34.20% of 770 =
  35. 35.5% of 400 =
  36. 36.10% of 330 =
  37. 37.1% of 470 =
  38. 38.1% of 180 =
  39. 39.15% of 30 =
  40. 40.15% of 110 =

Answer key

  1. 60
  2. 3.5
  3. 7.1
  4. 50
  5. 110
  6. 128
  7. 16
  8. 37.5
  9. 20.5
  10. 60
  11. 132
  12. 16.5
  13. 134
  14. 172.5
  15. 27
  16. 108
  17. 27.5
  18. 17.5
  19. 28
  20. 38
  21. 31.5
  22. 74
  23. 10.5
  24. 138
  25. 68
  26. 112
  27. 11
  28. 6
  29. 126
  30. 31.5
  31. 7.5
  32. 295
  33. 67.5
  34. 154
  35. 20
  36. 33
  37. 4.7
  38. 1.8
  39. 4.5
  40. 16.5

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