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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 680 · 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 200 =
  2. 2.50% of 130 =
  3. 3.25% of 240 =
  4. 4.20% of 760 =
  5. 5.5% of 120 =
  6. 6.5% of 850 =
  7. 7.5% of 190 =
  8. 8.15% of 740 =
  9. 9.1% of 260 =
  10. 10.50% of 550 =
  11. 11.5% of 120 =
  12. 12.5% of 230 =
  13. 13.20% of 200 =
  14. 14.50% of 260 =
  15. 15.5% of 50 =
  16. 16.15% of 280 =
  17. 17.15% of 460 =
  18. 18.25% of 730 =
  19. 19.20% of 720 =
  20. 20.15% of 730 =
  21. 21.5% of 80 =
  22. 22.20% of 660 =
  23. 23.25% of 430 =
  24. 24.20% of 670 =
  25. 25.15% of 850 =
  26. 26.15% of 690 =
  27. 27.10% of 250 =
  28. 28.25% of 330 =
  29. 29.25% of 30 =
  30. 30.20% of 250 =
  31. 31.25% of 50 =
  32. 32.25% of 30 =
  33. 33.10% of 720 =
  34. 34.10% of 840 =
  35. 35.5% of 160 =
  36. 36.10% of 230 =
  37. 37.15% of 770 =
  38. 38.1% of 550 =
  39. 39.20% of 390 =
  40. 40.15% of 480 =

Answer key

  1. 20
  2. 65
  3. 60
  4. 152
  5. 6
  6. 42.5
  7. 9.5
  8. 111
  9. 2.6
  10. 275
  11. 6
  12. 11.5
  13. 40
  14. 130
  15. 2.5
  16. 42
  17. 69
  18. 182.5
  19. 144
  20. 109.5
  21. 4
  22. 132
  23. 107.5
  24. 134
  25. 127.5
  26. 103.5
  27. 25
  28. 82.5
  29. 7.5
  30. 50
  31. 12.5
  32. 7.5
  33. 72
  34. 84
  35. 8
  36. 23
  37. 115.5
  38. 5.5
  39. 78
  40. 72

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