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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 146 · 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 640 =
  2. 2.1% of 270 =
  3. 3.20% of 550 =
  4. 4.10% of 280 =
  5. 5.10% of 900 =
  6. 6.50% of 650 =
  7. 7.25% of 770 =
  8. 8.5% of 840 =
  9. 9.25% of 340 =
  10. 10.20% of 690 =
  11. 11.5% of 240 =
  12. 12.1% of 610 =
  13. 13.5% of 900 =
  14. 14.5% of 140 =
  15. 15.10% of 390 =
  16. 16.15% of 560 =
  17. 17.5% of 160 =
  18. 18.1% of 590 =
  19. 19.20% of 250 =
  20. 20.15% of 40 =
  21. 21.5% of 50 =
  22. 22.5% of 70 =
  23. 23.5% of 80 =
  24. 24.10% of 50 =
  25. 25.20% of 150 =
  26. 26.15% of 170 =
  27. 27.15% of 500 =
  28. 28.15% of 130 =
  29. 29.1% of 50 =
  30. 30.10% of 650 =
  31. 31.5% of 780 =
  32. 32.25% of 670 =
  33. 33.20% of 50 =
  34. 34.25% of 490 =
  35. 35.5% of 390 =
  36. 36.5% of 370 =
  37. 37.25% of 790 =
  38. 38.1% of 120 =
  39. 39.25% of 670 =
  40. 40.50% of 810 =

Answer key

  1. 32
  2. 2.7
  3. 110
  4. 28
  5. 90
  6. 325
  7. 192.5
  8. 42
  9. 85
  10. 138
  11. 12
  12. 6.1
  13. 45
  14. 7
  15. 39
  16. 84
  17. 8
  18. 5.9
  19. 50
  20. 6
  21. 2.5
  22. 3.5
  23. 4
  24. 5
  25. 30
  26. 25.5
  27. 75
  28. 19.5
  29. 0.5
  30. 65
  31. 39
  32. 167.5
  33. 10
  34. 122.5
  35. 19.5
  36. 18.5
  37. 197.5
  38. 1.2
  39. 167.5
  40. 405

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