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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 532 · 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 120 =
  2. 2.25% of 800 =
  3. 3.50% of 540 =
  4. 4.15% of 60 =
  5. 5.1% of 370 =
  6. 6.20% of 530 =
  7. 7.15% of 370 =
  8. 8.15% of 250 =
  9. 9.20% of 80 =
  10. 10.20% of 810 =
  11. 11.10% of 890 =
  12. 12.25% of 360 =
  13. 13.5% of 890 =
  14. 14.15% of 180 =
  15. 15.5% of 770 =
  16. 16.1% of 530 =
  17. 17.5% of 720 =
  18. 18.5% of 310 =
  19. 19.15% of 890 =
  20. 20.15% of 570 =
  21. 21.5% of 620 =
  22. 22.1% of 390 =
  23. 23.15% of 630 =
  24. 24.5% of 260 =
  25. 25.25% of 580 =
  26. 26.15% of 610 =
  27. 27.15% of 190 =
  28. 28.25% of 260 =
  29. 29.50% of 150 =
  30. 30.15% of 310 =
  31. 31.15% of 100 =
  32. 32.50% of 790 =
  33. 33.5% of 830 =
  34. 34.1% of 620 =
  35. 35.15% of 760 =
  36. 36.5% of 370 =
  37. 37.50% of 450 =
  38. 38.5% of 110 =
  39. 39.5% of 790 =
  40. 40.5% of 440 =

Answer key

  1. 1.2
  2. 200
  3. 270
  4. 9
  5. 3.7
  6. 106
  7. 55.5
  8. 37.5
  9. 16
  10. 162
  11. 89
  12. 90
  13. 44.5
  14. 27
  15. 38.5
  16. 5.3
  17. 36
  18. 15.5
  19. 133.5
  20. 85.5
  21. 31
  22. 3.9
  23. 94.5
  24. 13
  25. 145
  26. 91.5
  27. 28.5
  28. 65
  29. 75
  30. 46.5
  31. 15
  32. 395
  33. 41.5
  34. 6.2
  35. 114
  36. 18.5
  37. 225
  38. 5.5
  39. 39.5
  40. 22

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