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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 39 · 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 840 =
  2. 2.1% of 810 =
  3. 3.15% of 440 =
  4. 4.15% of 110 =
  5. 5.50% of 720 =
  6. 6.5% of 630 =
  7. 7.15% of 280 =
  8. 8.50% of 860 =
  9. 9.25% of 590 =
  10. 10.1% of 220 =
  11. 11.10% of 280 =
  12. 12.1% of 280 =
  13. 13.10% of 150 =
  14. 14.15% of 770 =
  15. 15.10% of 300 =
  16. 16.10% of 70 =
  17. 17.10% of 590 =
  18. 18.15% of 900 =
  19. 19.20% of 570 =
  20. 20.5% of 60 =
  21. 21.25% of 400 =
  22. 22.5% of 100 =
  23. 23.10% of 380 =
  24. 24.20% of 60 =
  25. 25.10% of 560 =
  26. 26.5% of 660 =
  27. 27.25% of 50 =
  28. 28.10% of 180 =
  29. 29.20% of 480 =
  30. 30.15% of 590 =
  31. 31.5% of 850 =
  32. 32.50% of 260 =
  33. 33.1% of 650 =
  34. 34.1% of 880 =
  35. 35.5% of 530 =
  36. 36.25% of 750 =
  37. 37.20% of 740 =
  38. 38.10% of 830 =
  39. 39.10% of 760 =
  40. 40.25% of 420 =

Answer key

  1. 84
  2. 8.1
  3. 66
  4. 16.5
  5. 360
  6. 31.5
  7. 42
  8. 430
  9. 147.5
  10. 2.2
  11. 28
  12. 2.8
  13. 15
  14. 115.5
  15. 30
  16. 7
  17. 59
  18. 135
  19. 114
  20. 3
  21. 100
  22. 5
  23. 38
  24. 12
  25. 56
  26. 33
  27. 12.5
  28. 18
  29. 96
  30. 88.5
  31. 42.5
  32. 130
  33. 6.5
  34. 8.8
  35. 26.5
  36. 187.5
  37. 148
  38. 83
  39. 76
  40. 105

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