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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 937 · 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 890 =
  2. 2.15% of 230 =
  3. 3.50% of 480 =
  4. 4.5% of 600 =
  5. 5.1% of 50 =
  6. 6.50% of 570 =
  7. 7.1% of 550 =
  8. 8.25% of 550 =
  9. 9.25% of 240 =
  10. 10.5% of 790 =
  11. 11.50% of 780 =
  12. 12.5% of 390 =
  13. 13.5% of 790 =
  14. 14.5% of 20 =
  15. 15.10% of 180 =
  16. 16.25% of 670 =
  17. 17.1% of 580 =
  18. 18.5% of 50 =
  19. 19.20% of 450 =
  20. 20.1% of 70 =
  21. 21.20% of 220 =
  22. 22.50% of 670 =
  23. 23.5% of 770 =
  24. 24.50% of 300 =
  25. 25.15% of 900 =
  26. 26.15% of 650 =
  27. 27.25% of 410 =
  28. 28.20% of 420 =
  29. 29.25% of 20 =
  30. 30.20% of 880 =
  31. 31.10% of 200 =
  32. 32.15% of 260 =
  33. 33.25% of 110 =
  34. 34.25% of 20 =
  35. 35.5% of 230 =
  36. 36.10% of 350 =
  37. 37.20% of 580 =
  38. 38.10% of 60 =
  39. 39.20% of 190 =
  40. 40.15% of 490 =

Answer key

  1. 89
  2. 34.5
  3. 240
  4. 30
  5. 0.5
  6. 285
  7. 5.5
  8. 137.5
  9. 60
  10. 39.5
  11. 390
  12. 19.5
  13. 39.5
  14. 1
  15. 18
  16. 167.5
  17. 5.8
  18. 2.5
  19. 90
  20. 0.7
  21. 44
  22. 335
  23. 38.5
  24. 150
  25. 135
  26. 97.5
  27. 102.5
  28. 84
  29. 5
  30. 176
  31. 20
  32. 39
  33. 27.5
  34. 5
  35. 11.5
  36. 35
  37. 116
  38. 6
  39. 38
  40. 73.5

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