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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 651 · 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 760 =
  2. 2.25% of 790 =
  3. 3.5% of 420 =
  4. 4.15% of 890 =
  5. 5.5% of 380 =
  6. 6.50% of 720 =
  7. 7.15% of 870 =
  8. 8.10% of 600 =
  9. 9.1% of 420 =
  10. 10.5% of 760 =
  11. 11.5% of 140 =
  12. 12.1% of 350 =
  13. 13.50% of 80 =
  14. 14.5% of 810 =
  15. 15.50% of 250 =
  16. 16.10% of 670 =
  17. 17.10% of 500 =
  18. 18.1% of 690 =
  19. 19.5% of 640 =
  20. 20.25% of 490 =
  21. 21.20% of 680 =
  22. 22.1% of 870 =
  23. 23.10% of 30 =
  24. 24.15% of 720 =
  25. 25.10% of 680 =
  26. 26.5% of 120 =
  27. 27.10% of 200 =
  28. 28.10% of 400 =
  29. 29.1% of 900 =
  30. 30.1% of 210 =
  31. 31.1% of 720 =
  32. 32.20% of 280 =
  33. 33.25% of 780 =
  34. 34.10% of 60 =
  35. 35.15% of 830 =
  36. 36.50% of 790 =
  37. 37.25% of 90 =
  38. 38.25% of 330 =
  39. 39.10% of 250 =
  40. 40.50% of 250 =

Answer key

  1. 38
  2. 197.5
  3. 21
  4. 133.5
  5. 19
  6. 360
  7. 130.5
  8. 60
  9. 4.2
  10. 38
  11. 7
  12. 3.5
  13. 40
  14. 40.5
  15. 125
  16. 67
  17. 50
  18. 6.9
  19. 32
  20. 122.5
  21. 136
  22. 8.7
  23. 3
  24. 108
  25. 68
  26. 6
  27. 20
  28. 40
  29. 9
  30. 2.1
  31. 7.2
  32. 56
  33. 195
  34. 6
  35. 124.5
  36. 395
  37. 22.5
  38. 82.5
  39. 25
  40. 125

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