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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 657 · 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 840 =
  2. 2.50% of 480 =
  3. 3.15% of 210 =
  4. 4.25% of 720 =
  5. 5.5% of 790 =
  6. 6.25% of 320 =
  7. 7.50% of 370 =
  8. 8.50% of 280 =
  9. 9.10% of 530 =
  10. 10.15% of 480 =
  11. 11.1% of 200 =
  12. 12.10% of 200 =
  13. 13.10% of 180 =
  14. 14.5% of 760 =
  15. 15.5% of 530 =
  16. 16.15% of 850 =
  17. 17.1% of 710 =
  18. 18.10% of 290 =
  19. 19.20% of 630 =
  20. 20.10% of 270 =
  21. 21.10% of 700 =
  22. 22.25% of 500 =
  23. 23.1% of 190 =
  24. 24.50% of 550 =
  25. 25.5% of 40 =
  26. 26.1% of 400 =
  27. 27.15% of 100 =
  28. 28.10% of 750 =
  29. 29.50% of 830 =
  30. 30.20% of 360 =
  31. 31.25% of 360 =
  32. 32.1% of 720 =
  33. 33.20% of 660 =
  34. 34.10% of 140 =
  35. 35.20% of 810 =
  36. 36.5% of 830 =
  37. 37.10% of 500 =
  38. 38.25% of 800 =
  39. 39.20% of 360 =
  40. 40.20% of 750 =

Answer key

  1. 42
  2. 240
  3. 31.5
  4. 180
  5. 39.5
  6. 80
  7. 185
  8. 140
  9. 53
  10. 72
  11. 2
  12. 20
  13. 18
  14. 38
  15. 26.5
  16. 127.5
  17. 7.1
  18. 29
  19. 126
  20. 27
  21. 70
  22. 125
  23. 1.9
  24. 275
  25. 2
  26. 4
  27. 15
  28. 75
  29. 415
  30. 72
  31. 90
  32. 7.2
  33. 132
  34. 14
  35. 162
  36. 41.5
  37. 50
  38. 200
  39. 72
  40. 150

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