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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 810 · 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. 1.50% of 250 =
  2. 2.5% of 270 =
  3. 3.20% of 280 =
  4. 4.10% of 200 =
  5. 5.50% of 330 =
  6. 6.10% of 800 =
  7. 7.25% of 250 =
  8. 8.20% of 60 =
  9. 9.50% of 280 =
  10. 10.1% of 530 =
  11. 11.15% of 600 =
  12. 12.20% of 560 =
  13. 13.5% of 500 =
  14. 14.1% of 50 =
  15. 15.1% of 640 =
  16. 16.1% of 580 =
  17. 17.50% of 900 =
  18. 18.25% of 770 =
  19. 19.10% of 210 =
  20. 20.1% of 530 =
  21. 21.1% of 840 =
  22. 22.50% of 260 =
  23. 23.50% of 450 =
  24. 24.20% of 870 =
  25. 25.5% of 790 =
  26. 26.5% of 870 =
  27. 27.10% of 360 =
  28. 28.1% of 350 =
  29. 29.10% of 270 =
  30. 30.10% of 340 =
  31. 31.50% of 640 =
  32. 32.15% of 500 =
  33. 33.25% of 340 =
  34. 34.15% of 160 =
  35. 35.5% of 20 =
  36. 36.10% of 890 =
  37. 37.25% of 490 =
  38. 38.10% of 660 =
  39. 39.1% of 500 =
  40. 40.15% of 80 =

Answer key

  1. 125
  2. 13.5
  3. 56
  4. 20
  5. 165
  6. 80
  7. 62.5
  8. 12
  9. 140
  10. 5.3
  11. 90
  12. 112
  13. 25
  14. 0.5
  15. 6.4
  16. 5.8
  17. 450
  18. 192.5
  19. 21
  20. 5.3
  21. 8.4
  22. 130
  23. 225
  24. 174
  25. 39.5
  26. 43.5
  27. 36
  28. 3.5
  29. 27
  30. 34
  31. 320
  32. 75
  33. 85
  34. 24
  35. 1
  36. 89
  37. 122.5
  38. 66
  39. 5
  40. 12

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