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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 989 · 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. 1.10% of 190 =
  2. 2.25% of 870 =
  3. 3.25% of 710 =
  4. 4.5% of 370 =
  5. 5.50% of 480 =
  6. 6.1% of 470 =
  7. 7.10% of 430 =
  8. 8.5% of 190 =
  9. 9.25% of 330 =
  10. 10.10% of 770 =
  11. 11.5% of 620 =
  12. 12.25% of 470 =
  13. 13.10% of 600 =
  14. 14.15% of 520 =
  15. 15.15% of 90 =
  16. 16.1% of 130 =
  17. 17.50% of 530 =
  18. 18.5% of 600 =
  19. 19.20% of 140 =
  20. 20.50% of 280 =
  21. 21.1% of 540 =
  22. 22.20% of 600 =
  23. 23.1% of 830 =
  24. 24.15% of 60 =
  25. 25.20% of 790 =
  26. 26.25% of 420 =
  27. 27.20% of 190 =
  28. 28.25% of 120 =
  29. 29.5% of 540 =
  30. 30.1% of 120 =
  31. 31.20% of 500 =
  32. 32.5% of 270 =
  33. 33.10% of 70 =
  34. 34.10% of 520 =
  35. 35.15% of 520 =
  36. 36.15% of 370 =
  37. 37.5% of 860 =
  38. 38.10% of 860 =
  39. 39.25% of 850 =
  40. 40.20% of 620 =

Answer key

  1. 19
  2. 217.5
  3. 177.5
  4. 18.5
  5. 240
  6. 4.7
  7. 43
  8. 9.5
  9. 82.5
  10. 77
  11. 31
  12. 117.5
  13. 60
  14. 78
  15. 13.5
  16. 1.3
  17. 265
  18. 30
  19. 28
  20. 140
  21. 5.4
  22. 120
  23. 8.3
  24. 9
  25. 158
  26. 105
  27. 38
  28. 30
  29. 27
  30. 1.2
  31. 100
  32. 13.5
  33. 7
  34. 52
  35. 78
  36. 55.5
  37. 43
  38. 86
  39. 212.5
  40. 124

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