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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 856 · 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 420 =
  2. 2.10% of 90 =
  3. 3.15% of 340 =
  4. 4.10% of 800 =
  5. 5.1% of 870 =
  6. 6.50% of 360 =
  7. 7.10% of 520 =
  8. 8.10% of 750 =
  9. 9.10% of 210 =
  10. 10.20% of 130 =
  11. 11.20% of 410 =
  12. 12.15% of 250 =
  13. 13.5% of 260 =
  14. 14.20% of 510 =
  15. 15.20% of 340 =
  16. 16.50% of 200 =
  17. 17.15% of 750 =
  18. 18.10% of 170 =
  19. 19.20% of 480 =
  20. 20.50% of 210 =
  21. 21.25% of 520 =
  22. 22.50% of 340 =
  23. 23.1% of 860 =
  24. 24.1% of 620 =
  25. 25.15% of 430 =
  26. 26.5% of 720 =
  27. 27.25% of 830 =
  28. 28.50% of 540 =
  29. 29.10% of 610 =
  30. 30.5% of 380 =
  31. 31.10% of 890 =
  32. 32.20% of 210 =
  33. 33.15% of 340 =
  34. 34.5% of 590 =
  35. 35.1% of 590 =
  36. 36.5% of 260 =
  37. 37.15% of 540 =
  38. 38.1% of 260 =
  39. 39.20% of 590 =
  40. 40.5% of 820 =

Answer key

  1. 4.2
  2. 9
  3. 51
  4. 80
  5. 8.7
  6. 180
  7. 52
  8. 75
  9. 21
  10. 26
  11. 82
  12. 37.5
  13. 13
  14. 102
  15. 68
  16. 100
  17. 112.5
  18. 17
  19. 96
  20. 105
  21. 130
  22. 170
  23. 8.6
  24. 6.2
  25. 64.5
  26. 36
  27. 207.5
  28. 270
  29. 61
  30. 19
  31. 89
  32. 42
  33. 51
  34. 29.5
  35. 5.9
  36. 13
  37. 81
  38. 2.6
  39. 118
  40. 41

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