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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 185 · 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. 1.5% of 240 =
  2. 2.25% of 570 =
  3. 3.10% of 430 =
  4. 4.1% of 370 =
  5. 5.10% of 150 =
  6. 6.10% of 70 =
  7. 7.15% of 190 =
  8. 8.1% of 370 =
  9. 9.10% of 810 =
  10. 10.1% of 570 =
  11. 11.1% of 720 =
  12. 12.15% of 780 =
  13. 13.1% of 130 =
  14. 14.10% of 470 =
  15. 15.1% of 610 =
  16. 16.25% of 480 =
  17. 17.15% of 690 =
  18. 18.20% of 420 =
  19. 19.25% of 750 =
  20. 20.50% of 500 =
  21. 21.15% of 440 =
  22. 22.25% of 710 =
  23. 23.1% of 450 =
  24. 24.20% of 380 =
  25. 25.1% of 790 =
  26. 26.25% of 470 =
  27. 27.1% of 400 =
  28. 28.25% of 20 =
  29. 29.50% of 630 =
  30. 30.5% of 790 =
  31. 31.50% of 640 =
  32. 32.10% of 550 =
  33. 33.15% of 680 =
  34. 34.10% of 850 =
  35. 35.1% of 600 =
  36. 36.20% of 770 =
  37. 37.20% of 40 =
  38. 38.1% of 60 =
  39. 39.25% of 780 =
  40. 40.25% of 130 =

Answer key

  1. 12
  2. 142.5
  3. 43
  4. 3.7
  5. 15
  6. 7
  7. 28.5
  8. 3.7
  9. 81
  10. 5.7
  11. 7.2
  12. 117
  13. 1.3
  14. 47
  15. 6.1
  16. 120
  17. 103.5
  18. 84
  19. 187.5
  20. 250
  21. 66
  22. 177.5
  23. 4.5
  24. 76
  25. 7.9
  26. 117.5
  27. 4
  28. 5
  29. 315
  30. 39.5
  31. 320
  32. 55
  33. 102
  34. 85
  35. 6
  36. 154
  37. 8
  38. 0.6
  39. 195
  40. 32.5

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