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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 808 · 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. 1.20% of 250 =
  2. 2.10% of 800 =
  3. 3.50% of 90 =
  4. 4.20% of 900 =
  5. 5.25% of 670 =
  6. 6.25% of 490 =
  7. 7.15% of 300 =
  8. 8.15% of 800 =
  9. 9.1% of 120 =
  10. 10.5% of 600 =
  11. 11.15% of 760 =
  12. 12.15% of 140 =
  13. 13.1% of 880 =
  14. 14.10% of 20 =
  15. 15.1% of 470 =
  16. 16.20% of 360 =
  17. 17.1% of 570 =
  18. 18.15% of 710 =
  19. 19.20% of 500 =
  20. 20.20% of 510 =
  21. 21.25% of 280 =
  22. 22.25% of 720 =
  23. 23.10% of 160 =
  24. 24.5% of 130 =
  25. 25.1% of 710 =
  26. 26.1% of 460 =
  27. 27.10% of 240 =
  28. 28.15% of 640 =
  29. 29.20% of 900 =
  30. 30.25% of 810 =
  31. 31.5% of 50 =
  32. 32.1% of 870 =
  33. 33.1% of 280 =
  34. 34.25% of 690 =
  35. 35.20% of 520 =
  36. 36.10% of 760 =
  37. 37.50% of 480 =
  38. 38.25% of 80 =
  39. 39.5% of 830 =
  40. 40.50% of 670 =

Answer key

  1. 50
  2. 80
  3. 45
  4. 180
  5. 167.5
  6. 122.5
  7. 45
  8. 120
  9. 1.2
  10. 30
  11. 114
  12. 21
  13. 8.8
  14. 2
  15. 4.7
  16. 72
  17. 5.7
  18. 106.5
  19. 100
  20. 102
  21. 70
  22. 180
  23. 16
  24. 6.5
  25. 7.1
  26. 4.6
  27. 24
  28. 96
  29. 180
  30. 202.5
  31. 2.5
  32. 8.7
  33. 2.8
  34. 172.5
  35. 104
  36. 76
  37. 240
  38. 20
  39. 41.5
  40. 335

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