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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 849 · 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 310 =
  2. 2.25% of 140 =
  3. 3.50% of 180 =
  4. 4.15% of 350 =
  5. 5.5% of 50 =
  6. 6.5% of 100 =
  7. 7.20% of 200 =
  8. 8.15% of 300 =
  9. 9.5% of 240 =
  10. 10.20% of 190 =
  11. 11.10% of 470 =
  12. 12.1% of 50 =
  13. 13.1% of 140 =
  14. 14.20% of 150 =
  15. 15.50% of 380 =
  16. 16.15% of 790 =
  17. 17.20% of 100 =
  18. 18.10% of 670 =
  19. 19.20% of 90 =
  20. 20.50% of 320 =
  21. 21.1% of 470 =
  22. 22.1% of 700 =
  23. 23.20% of 170 =
  24. 24.20% of 700 =
  25. 25.10% of 830 =
  26. 26.1% of 770 =
  27. 27.15% of 30 =
  28. 28.1% of 860 =
  29. 29.50% of 40 =
  30. 30.15% of 170 =
  31. 31.50% of 590 =
  32. 32.25% of 360 =
  33. 33.25% of 420 =
  34. 34.15% of 750 =
  35. 35.25% of 450 =
  36. 36.1% of 610 =
  37. 37.50% of 190 =
  38. 38.5% of 250 =
  39. 39.10% of 570 =
  40. 40.15% of 620 =

Answer key

  1. 3.1
  2. 35
  3. 90
  4. 52.5
  5. 2.5
  6. 5
  7. 40
  8. 45
  9. 12
  10. 38
  11. 47
  12. 0.5
  13. 1.4
  14. 30
  15. 190
  16. 118.5
  17. 20
  18. 67
  19. 18
  20. 160
  21. 4.7
  22. 7
  23. 34
  24. 140
  25. 83
  26. 7.7
  27. 4.5
  28. 8.6
  29. 20
  30. 25.5
  31. 295
  32. 90
  33. 105
  34. 112.5
  35. 112.5
  36. 6.1
  37. 95
  38. 12.5
  39. 57
  40. 93

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