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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 831 · 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. 1.5% of 70 =
  2. 2.20% of 280 =
  3. 3.10% of 530 =
  4. 4.1% of 700 =
  5. 5.5% of 840 =
  6. 6.25% of 640 =
  7. 7.5% of 100 =
  8. 8.1% of 580 =
  9. 9.5% of 170 =
  10. 10.50% of 110 =
  11. 11.25% of 760 =
  12. 12.10% of 320 =
  13. 13.20% of 40 =
  14. 14.1% of 670 =
  15. 15.25% of 240 =
  16. 16.15% of 70 =
  17. 17.25% of 230 =
  18. 18.10% of 770 =
  19. 19.15% of 490 =
  20. 20.50% of 100 =
  21. 21.20% of 780 =
  22. 22.25% of 790 =
  23. 23.50% of 700 =
  24. 24.10% of 680 =
  25. 25.15% of 510 =
  26. 26.5% of 700 =
  27. 27.1% of 420 =
  28. 28.50% of 160 =
  29. 29.1% of 690 =
  30. 30.15% of 230 =
  31. 31.10% of 890 =
  32. 32.10% of 50 =
  33. 33.50% of 410 =
  34. 34.10% of 80 =
  35. 35.1% of 180 =
  36. 36.50% of 560 =
  37. 37.15% of 680 =
  38. 38.10% of 560 =
  39. 39.10% of 440 =
  40. 40.1% of 660 =

Answer key

  1. 3.5
  2. 56
  3. 53
  4. 7
  5. 42
  6. 160
  7. 5
  8. 5.8
  9. 8.5
  10. 55
  11. 190
  12. 32
  13. 8
  14. 6.7
  15. 60
  16. 10.5
  17. 57.5
  18. 77
  19. 73.5
  20. 50
  21. 156
  22. 197.5
  23. 350
  24. 68
  25. 76.5
  26. 35
  27. 4.2
  28. 80
  29. 6.9
  30. 34.5
  31. 89
  32. 5
  33. 205
  34. 8
  35. 1.8
  36. 280
  37. 102
  38. 56
  39. 44
  40. 6.6

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