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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 57 · 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 450 =
  2. 2.25% of 20 =
  3. 3.15% of 480 =
  4. 4.10% of 720 =
  5. 5.5% of 300 =
  6. 6.1% of 500 =
  7. 7.1% of 270 =
  8. 8.5% of 780 =
  9. 9.5% of 60 =
  10. 10.10% of 240 =
  11. 11.25% of 40 =
  12. 12.15% of 830 =
  13. 13.1% of 150 =
  14. 14.25% of 590 =
  15. 15.1% of 570 =
  16. 16.20% of 780 =
  17. 17.15% of 70 =
  18. 18.1% of 670 =
  19. 19.20% of 500 =
  20. 20.20% of 200 =
  21. 21.25% of 820 =
  22. 22.15% of 20 =
  23. 23.25% of 620 =
  24. 24.15% of 640 =
  25. 25.15% of 820 =
  26. 26.25% of 30 =
  27. 27.15% of 770 =
  28. 28.5% of 880 =
  29. 29.10% of 750 =
  30. 30.5% of 550 =
  31. 31.15% of 840 =
  32. 32.5% of 450 =
  33. 33.10% of 540 =
  34. 34.20% of 220 =
  35. 35.50% of 240 =
  36. 36.1% of 90 =
  37. 37.5% of 750 =
  38. 38.25% of 210 =
  39. 39.25% of 610 =
  40. 40.20% of 350 =

Answer key

  1. 45
  2. 5
  3. 72
  4. 72
  5. 15
  6. 5
  7. 2.7
  8. 39
  9. 3
  10. 24
  11. 10
  12. 124.5
  13. 1.5
  14. 147.5
  15. 5.7
  16. 156
  17. 10.5
  18. 6.7
  19. 100
  20. 40
  21. 205
  22. 3
  23. 155
  24. 96
  25. 123
  26. 7.5
  27. 115.5
  28. 44
  29. 75
  30. 27.5
  31. 126
  32. 22.5
  33. 54
  34. 44
  35. 120
  36. 0.9
  37. 37.5
  38. 52.5
  39. 152.5
  40. 70

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