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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 863 · 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. 1.1% of 110 =
  2. 2.50% of 500 =
  3. 3.25% of 600 =
  4. 4.5% of 230 =
  5. 5.1% of 650 =
  6. 6.10% of 200 =
  7. 7.10% of 340 =
  8. 8.20% of 250 =
  9. 9.5% of 410 =
  10. 10.10% of 120 =
  11. 11.50% of 720 =
  12. 12.20% of 240 =
  13. 13.10% of 260 =
  14. 14.5% of 230 =
  15. 15.1% of 620 =
  16. 16.50% of 360 =
  17. 17.25% of 350 =
  18. 18.50% of 790 =
  19. 19.25% of 80 =
  20. 20.20% of 140 =
  21. 21.1% of 650 =
  22. 22.5% of 690 =
  23. 23.10% of 560 =
  24. 24.20% of 470 =
  25. 25.25% of 440 =
  26. 26.20% of 670 =
  27. 27.5% of 160 =
  28. 28.10% of 580 =
  29. 29.10% of 100 =
  30. 30.10% of 650 =
  31. 31.20% of 100 =
  32. 32.15% of 130 =
  33. 33.25% of 290 =
  34. 34.20% of 240 =
  35. 35.25% of 860 =
  36. 36.15% of 290 =
  37. 37.15% of 130 =
  38. 38.20% of 510 =
  39. 39.1% of 690 =
  40. 40.50% of 530 =

Answer key

  1. 1.1
  2. 250
  3. 150
  4. 11.5
  5. 6.5
  6. 20
  7. 34
  8. 50
  9. 20.5
  10. 12
  11. 360
  12. 48
  13. 26
  14. 11.5
  15. 6.2
  16. 180
  17. 87.5
  18. 395
  19. 20
  20. 28
  21. 6.5
  22. 34.5
  23. 56
  24. 94
  25. 110
  26. 134
  27. 8
  28. 58
  29. 10
  30. 65
  31. 20
  32. 19.5
  33. 72.5
  34. 48
  35. 215
  36. 43.5
  37. 19.5
  38. 102
  39. 6.9
  40. 265

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