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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 8 · 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. 1.10% of 710 =
  2. 2.25% of 600 =
  3. 3.25% of 900 =
  4. 4.1% of 460 =
  5. 5.10% of 650 =
  6. 6.20% of 610 =
  7. 7.25% of 640 =
  8. 8.20% of 330 =
  9. 9.5% of 80 =
  10. 10.5% of 410 =
  11. 11.1% of 780 =
  12. 12.5% of 760 =
  13. 13.20% of 80 =
  14. 14.50% of 90 =
  15. 15.1% of 230 =
  16. 16.1% of 560 =
  17. 17.25% of 40 =
  18. 18.50% of 570 =
  19. 19.25% of 30 =
  20. 20.5% of 690 =
  21. 21.1% of 270 =
  22. 22.5% of 560 =
  23. 23.50% of 230 =
  24. 24.15% of 150 =
  25. 25.50% of 110 =
  26. 26.15% of 300 =
  27. 27.25% of 610 =
  28. 28.1% of 240 =
  29. 29.10% of 270 =
  30. 30.20% of 610 =
  31. 31.5% of 300 =
  32. 32.50% of 360 =
  33. 33.25% of 490 =
  34. 34.15% of 230 =
  35. 35.20% of 530 =
  36. 36.10% of 60 =
  37. 37.5% of 830 =
  38. 38.5% of 360 =
  39. 39.15% of 740 =
  40. 40.50% of 610 =

Answer key

  1. 71
  2. 150
  3. 225
  4. 4.6
  5. 65
  6. 122
  7. 160
  8. 66
  9. 4
  10. 20.5
  11. 7.8
  12. 38
  13. 16
  14. 45
  15. 2.3
  16. 5.6
  17. 10
  18. 285
  19. 7.5
  20. 34.5
  21. 2.7
  22. 28
  23. 115
  24. 22.5
  25. 55
  26. 45
  27. 152.5
  28. 2.4
  29. 27
  30. 122
  31. 15
  32. 180
  33. 122.5
  34. 34.5
  35. 106
  36. 6
  37. 41.5
  38. 18
  39. 111
  40. 305

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