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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 137 · 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 820 =
  2. 2.1% of 60 =
  3. 3.5% of 730 =
  4. 4.5% of 230 =
  5. 5.15% of 280 =
  6. 6.25% of 540 =
  7. 7.15% of 250 =
  8. 8.5% of 50 =
  9. 9.20% of 230 =
  10. 10.15% of 700 =
  11. 11.25% of 800 =
  12. 12.5% of 60 =
  13. 13.10% of 200 =
  14. 14.20% of 190 =
  15. 15.20% of 250 =
  16. 16.15% of 230 =
  17. 17.25% of 190 =
  18. 18.1% of 800 =
  19. 19.5% of 240 =
  20. 20.1% of 860 =
  21. 21.50% of 150 =
  22. 22.10% of 170 =
  23. 23.1% of 30 =
  24. 24.25% of 310 =
  25. 25.50% of 430 =
  26. 26.15% of 850 =
  27. 27.5% of 850 =
  28. 28.1% of 190 =
  29. 29.15% of 130 =
  30. 30.10% of 670 =
  31. 31.1% of 790 =
  32. 32.1% of 780 =
  33. 33.15% of 550 =
  34. 34.15% of 720 =
  35. 35.15% of 610 =
  36. 36.10% of 60 =
  37. 37.15% of 170 =
  38. 38.25% of 290 =
  39. 39.50% of 640 =
  40. 40.20% of 530 =

Answer key

  1. 164
  2. 0.6
  3. 36.5
  4. 11.5
  5. 42
  6. 135
  7. 37.5
  8. 2.5
  9. 46
  10. 105
  11. 200
  12. 3
  13. 20
  14. 38
  15. 50
  16. 34.5
  17. 47.5
  18. 8
  19. 12
  20. 8.6
  21. 75
  22. 17
  23. 0.3
  24. 77.5
  25. 215
  26. 127.5
  27. 42.5
  28. 1.9
  29. 19.5
  30. 67
  31. 7.9
  32. 7.8
  33. 82.5
  34. 108
  35. 91.5
  36. 6
  37. 25.5
  38. 72.5
  39. 320
  40. 106

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