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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 951 · 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. 1.50% of 380 =
  2. 2.15% of 890 =
  3. 3.5% of 30 =
  4. 4.10% of 550 =
  5. 5.15% of 410 =
  6. 6.5% of 550 =
  7. 7.5% of 870 =
  8. 8.1% of 140 =
  9. 9.1% of 790 =
  10. 10.1% of 560 =
  11. 11.5% of 860 =
  12. 12.20% of 120 =
  13. 13.50% of 480 =
  14. 14.10% of 710 =
  15. 15.25% of 480 =
  16. 16.5% of 580 =
  17. 17.1% of 400 =
  18. 18.5% of 400 =
  19. 19.15% of 380 =
  20. 20.10% of 200 =
  21. 21.50% of 670 =
  22. 22.1% of 650 =
  23. 23.10% of 830 =
  24. 24.5% of 660 =
  25. 25.20% of 500 =
  26. 26.5% of 590 =
  27. 27.1% of 250 =
  28. 28.15% of 230 =
  29. 29.10% of 290 =
  30. 30.50% of 770 =
  31. 31.15% of 780 =
  32. 32.5% of 560 =
  33. 33.15% of 270 =
  34. 34.10% of 840 =
  35. 35.25% of 480 =
  36. 36.15% of 220 =
  37. 37.20% of 350 =
  38. 38.20% of 230 =
  39. 39.20% of 310 =
  40. 40.1% of 670 =

Answer key

  1. 190
  2. 133.5
  3. 1.5
  4. 55
  5. 61.5
  6. 27.5
  7. 43.5
  8. 1.4
  9. 7.9
  10. 5.6
  11. 43
  12. 24
  13. 240
  14. 71
  15. 120
  16. 29
  17. 4
  18. 20
  19. 57
  20. 20
  21. 335
  22. 6.5
  23. 83
  24. 33
  25. 100
  26. 29.5
  27. 2.5
  28. 34.5
  29. 29
  30. 385
  31. 117
  32. 28
  33. 40.5
  34. 84
  35. 120
  36. 33
  37. 70
  38. 46
  39. 62
  40. 6.7

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