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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 839 · 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 340 =
  2. 2.10% of 80 =
  3. 3.15% of 740 =
  4. 4.20% of 110 =
  5. 5.15% of 890 =
  6. 6.10% of 260 =
  7. 7.25% of 450 =
  8. 8.20% of 720 =
  9. 9.5% of 680 =
  10. 10.50% of 840 =
  11. 11.10% of 280 =
  12. 12.20% of 500 =
  13. 13.1% of 810 =
  14. 14.1% of 360 =
  15. 15.50% of 640 =
  16. 16.1% of 390 =
  17. 17.20% of 360 =
  18. 18.15% of 160 =
  19. 19.5% of 30 =
  20. 20.50% of 90 =
  21. 21.5% of 270 =
  22. 22.20% of 810 =
  23. 23.10% of 90 =
  24. 24.50% of 380 =
  25. 25.20% of 410 =
  26. 26.25% of 150 =
  27. 27.25% of 150 =
  28. 28.5% of 610 =
  29. 29.10% of 20 =
  30. 30.5% of 300 =
  31. 31.25% of 790 =
  32. 32.50% of 90 =
  33. 33.20% of 590 =
  34. 34.15% of 40 =
  35. 35.1% of 480 =
  36. 36.50% of 100 =
  37. 37.15% of 70 =
  38. 38.5% of 140 =
  39. 39.20% of 110 =
  40. 40.20% of 460 =

Answer key

  1. 17
  2. 8
  3. 111
  4. 22
  5. 133.5
  6. 26
  7. 112.5
  8. 144
  9. 34
  10. 420
  11. 28
  12. 100
  13. 8.1
  14. 3.6
  15. 320
  16. 3.9
  17. 72
  18. 24
  19. 1.5
  20. 45
  21. 13.5
  22. 162
  23. 9
  24. 190
  25. 82
  26. 37.5
  27. 37.5
  28. 30.5
  29. 2
  30. 15
  31. 197.5
  32. 45
  33. 118
  34. 6
  35. 4.8
  36. 50
  37. 10.5
  38. 7
  39. 22
  40. 92

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