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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 183 · 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 400 =
  2. 2.20% of 780 =
  3. 3.25% of 420 =
  4. 4.15% of 210 =
  5. 5.5% of 60 =
  6. 6.5% of 80 =
  7. 7.5% of 170 =
  8. 8.1% of 780 =
  9. 9.25% of 760 =
  10. 10.25% of 900 =
  11. 11.10% of 80 =
  12. 12.5% of 570 =
  13. 13.25% of 870 =
  14. 14.10% of 610 =
  15. 15.1% of 200 =
  16. 16.15% of 700 =
  17. 17.15% of 900 =
  18. 18.25% of 40 =
  19. 19.25% of 50 =
  20. 20.5% of 240 =
  21. 21.15% of 40 =
  22. 22.10% of 200 =
  23. 23.25% of 380 =
  24. 24.20% of 610 =
  25. 25.1% of 830 =
  26. 26.15% of 340 =
  27. 27.50% of 810 =
  28. 28.25% of 260 =
  29. 29.25% of 330 =
  30. 30.25% of 870 =
  31. 31.50% of 440 =
  32. 32.25% of 710 =
  33. 33.5% of 50 =
  34. 34.50% of 710 =
  35. 35.5% of 750 =
  36. 36.5% of 280 =
  37. 37.25% of 430 =
  38. 38.25% of 690 =
  39. 39.10% of 380 =
  40. 40.50% of 780 =

Answer key

  1. 40
  2. 156
  3. 105
  4. 31.5
  5. 3
  6. 4
  7. 8.5
  8. 7.8
  9. 190
  10. 225
  11. 8
  12. 28.5
  13. 217.5
  14. 61
  15. 2
  16. 105
  17. 135
  18. 10
  19. 12.5
  20. 12
  21. 6
  22. 20
  23. 95
  24. 122
  25. 8.3
  26. 51
  27. 405
  28. 65
  29. 82.5
  30. 217.5
  31. 220
  32. 177.5
  33. 2.5
  34. 355
  35. 37.5
  36. 14
  37. 107.5
  38. 172.5
  39. 38
  40. 390

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