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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 166 · 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. 1.1% of 410 =
  2. 2.25% of 460 =
  3. 3.50% of 110 =
  4. 4.50% of 460 =
  5. 5.10% of 270 =
  6. 6.1% of 380 =
  7. 7.25% of 140 =
  8. 8.10% of 870 =
  9. 9.15% of 130 =
  10. 10.10% of 690 =
  11. 11.5% of 880 =
  12. 12.20% of 60 =
  13. 13.25% of 630 =
  14. 14.25% of 200 =
  15. 15.50% of 830 =
  16. 16.5% of 150 =
  17. 17.50% of 760 =
  18. 18.10% of 240 =
  19. 19.10% of 150 =
  20. 20.10% of 140 =
  21. 21.5% of 740 =
  22. 22.50% of 830 =
  23. 23.10% of 530 =
  24. 24.15% of 410 =
  25. 25.5% of 240 =
  26. 26.10% of 80 =
  27. 27.15% of 770 =
  28. 28.1% of 680 =
  29. 29.25% of 790 =
  30. 30.10% of 20 =
  31. 31.5% of 810 =
  32. 32.50% of 290 =
  33. 33.25% of 810 =
  34. 34.1% of 110 =
  35. 35.5% of 70 =
  36. 36.1% of 370 =
  37. 37.5% of 80 =
  38. 38.50% of 550 =
  39. 39.50% of 280 =
  40. 40.5% of 280 =

Answer key

  1. 4.1
  2. 115
  3. 55
  4. 230
  5. 27
  6. 3.8
  7. 35
  8. 87
  9. 19.5
  10. 69
  11. 44
  12. 12
  13. 157.5
  14. 50
  15. 415
  16. 7.5
  17. 380
  18. 24
  19. 15
  20. 14
  21. 37
  22. 415
  23. 53
  24. 61.5
  25. 12
  26. 8
  27. 115.5
  28. 6.8
  29. 197.5
  30. 2
  31. 40.5
  32. 145
  33. 202.5
  34. 1.1
  35. 3.5
  36. 3.7
  37. 4
  38. 275
  39. 140
  40. 14

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