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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 67 · 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 20 =
  2. 2.10% of 170 =
  3. 3.25% of 790 =
  4. 4.15% of 650 =
  5. 5.5% of 760 =
  6. 6.5% of 690 =
  7. 7.50% of 830 =
  8. 8.5% of 300 =
  9. 9.15% of 280 =
  10. 10.10% of 610 =
  11. 11.10% of 60 =
  12. 12.10% of 610 =
  13. 13.10% of 450 =
  14. 14.50% of 480 =
  15. 15.10% of 450 =
  16. 16.10% of 220 =
  17. 17.5% of 40 =
  18. 18.10% of 870 =
  19. 19.10% of 790 =
  20. 20.5% of 260 =
  21. 21.20% of 250 =
  22. 22.15% of 900 =
  23. 23.1% of 250 =
  24. 24.20% of 210 =
  25. 25.10% of 220 =
  26. 26.5% of 360 =
  27. 27.1% of 280 =
  28. 28.15% of 650 =
  29. 29.5% of 420 =
  30. 30.10% of 70 =
  31. 31.25% of 370 =
  32. 32.50% of 260 =
  33. 33.1% of 850 =
  34. 34.20% of 410 =
  35. 35.15% of 170 =
  36. 36.50% of 890 =
  37. 37.5% of 700 =
  38. 38.5% of 750 =
  39. 39.20% of 370 =
  40. 40.25% of 90 =

Answer key

  1. 1
  2. 17
  3. 197.5
  4. 97.5
  5. 38
  6. 34.5
  7. 415
  8. 15
  9. 42
  10. 61
  11. 6
  12. 61
  13. 45
  14. 240
  15. 45
  16. 22
  17. 2
  18. 87
  19. 79
  20. 13
  21. 50
  22. 135
  23. 2.5
  24. 42
  25. 22
  26. 18
  27. 2.8
  28. 97.5
  29. 21
  30. 7
  31. 92.5
  32. 130
  33. 8.5
  34. 82
  35. 25.5
  36. 445
  37. 35
  38. 37.5
  39. 74
  40. 22.5

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