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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 931 · 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. 1.25% of 170 =
  2. 2.10% of 810 =
  3. 3.25% of 50 =
  4. 4.20% of 610 =
  5. 5.15% of 270 =
  6. 6.15% of 600 =
  7. 7.50% of 400 =
  8. 8.25% of 20 =
  9. 9.20% of 650 =
  10. 10.25% of 490 =
  11. 11.50% of 520 =
  12. 12.15% of 220 =
  13. 13.20% of 380 =
  14. 14.20% of 50 =
  15. 15.50% of 100 =
  16. 16.1% of 20 =
  17. 17.20% of 800 =
  18. 18.15% of 210 =
  19. 19.25% of 540 =
  20. 20.10% of 430 =
  21. 21.25% of 110 =
  22. 22.10% of 560 =
  23. 23.15% of 890 =
  24. 24.1% of 700 =
  25. 25.5% of 170 =
  26. 26.5% of 770 =
  27. 27.25% of 520 =
  28. 28.25% of 330 =
  29. 29.50% of 500 =
  30. 30.15% of 890 =
  31. 31.1% of 700 =
  32. 32.15% of 730 =
  33. 33.25% of 130 =
  34. 34.10% of 700 =
  35. 35.10% of 720 =
  36. 36.20% of 160 =
  37. 37.10% of 850 =
  38. 38.10% of 700 =
  39. 39.25% of 360 =
  40. 40.5% of 400 =

Answer key

  1. 42.5
  2. 81
  3. 12.5
  4. 122
  5. 40.5
  6. 90
  7. 200
  8. 5
  9. 130
  10. 122.5
  11. 260
  12. 33
  13. 76
  14. 10
  15. 50
  16. 0.2
  17. 160
  18. 31.5
  19. 135
  20. 43
  21. 27.5
  22. 56
  23. 133.5
  24. 7
  25. 8.5
  26. 38.5
  27. 130
  28. 82.5
  29. 250
  30. 133.5
  31. 7
  32. 109.5
  33. 32.5
  34. 70
  35. 72
  36. 32
  37. 85
  38. 70
  39. 90
  40. 20

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