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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 980 · 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. 1.20% of 810 =
  2. 2.25% of 170 =
  3. 3.15% of 520 =
  4. 4.50% of 710 =
  5. 5.10% of 160 =
  6. 6.5% of 150 =
  7. 7.50% of 190 =
  8. 8.10% of 520 =
  9. 9.25% of 210 =
  10. 10.20% of 870 =
  11. 11.20% of 330 =
  12. 12.10% of 240 =
  13. 13.5% of 200 =
  14. 14.1% of 110 =
  15. 15.5% of 760 =
  16. 16.20% of 190 =
  17. 17.50% of 830 =
  18. 18.15% of 520 =
  19. 19.10% of 260 =
  20. 20.20% of 150 =
  21. 21.5% of 240 =
  22. 22.5% of 750 =
  23. 23.25% of 710 =
  24. 24.5% of 150 =
  25. 25.50% of 250 =
  26. 26.20% of 450 =
  27. 27.15% of 520 =
  28. 28.25% of 830 =
  29. 29.15% of 140 =
  30. 30.5% of 100 =
  31. 31.5% of 770 =
  32. 32.10% of 590 =
  33. 33.50% of 640 =
  34. 34.50% of 820 =
  35. 35.10% of 480 =
  36. 36.20% of 480 =
  37. 37.50% of 780 =
  38. 38.15% of 370 =
  39. 39.5% of 820 =
  40. 40.5% of 50 =

Answer key

  1. 162
  2. 42.5
  3. 78
  4. 355
  5. 16
  6. 7.5
  7. 95
  8. 52
  9. 52.5
  10. 174
  11. 66
  12. 24
  13. 10
  14. 1.1
  15. 38
  16. 38
  17. 415
  18. 78
  19. 26
  20. 30
  21. 12
  22. 37.5
  23. 177.5
  24. 7.5
  25. 125
  26. 90
  27. 78
  28. 207.5
  29. 21
  30. 5
  31. 38.5
  32. 59
  33. 320
  34. 410
  35. 48
  36. 96
  37. 390
  38. 55.5
  39. 41
  40. 2.5

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