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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 506 · 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 100 =
  2. 2.1% of 70 =
  3. 3.15% of 870 =
  4. 4.1% of 210 =
  5. 5.5% of 100 =
  6. 6.10% of 560 =
  7. 7.5% of 880 =
  8. 8.20% of 480 =
  9. 9.50% of 130 =
  10. 10.5% of 690 =
  11. 11.15% of 420 =
  12. 12.1% of 170 =
  13. 13.5% of 40 =
  14. 14.20% of 180 =
  15. 15.50% of 890 =
  16. 16.20% of 510 =
  17. 17.20% of 180 =
  18. 18.15% of 590 =
  19. 19.5% of 230 =
  20. 20.10% of 660 =
  21. 21.10% of 100 =
  22. 22.25% of 200 =
  23. 23.50% of 260 =
  24. 24.10% of 450 =
  25. 25.10% of 690 =
  26. 26.5% of 800 =
  27. 27.25% of 270 =
  28. 28.5% of 50 =
  29. 29.5% of 90 =
  30. 30.10% of 900 =
  31. 31.1% of 160 =
  32. 32.20% of 870 =
  33. 33.20% of 230 =
  34. 34.20% of 260 =
  35. 35.10% of 480 =
  36. 36.1% of 100 =
  37. 37.5% of 250 =
  38. 38.20% of 410 =
  39. 39.10% of 750 =
  40. 40.20% of 470 =

Answer key

  1. 1
  2. 0.7
  3. 130.5
  4. 2.1
  5. 5
  6. 56
  7. 44
  8. 96
  9. 65
  10. 34.5
  11. 63
  12. 1.7
  13. 2
  14. 36
  15. 445
  16. 102
  17. 36
  18. 88.5
  19. 11.5
  20. 66
  21. 10
  22. 50
  23. 130
  24. 45
  25. 69
  26. 40
  27. 67.5
  28. 2.5
  29. 4.5
  30. 90
  31. 1.6
  32. 174
  33. 46
  34. 52
  35. 48
  36. 1
  37. 12.5
  38. 82
  39. 75
  40. 94

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