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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 336 · 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 270 =
  2. 2.25% of 850 =
  3. 3.5% of 690 =
  4. 4.1% of 80 =
  5. 5.20% of 40 =
  6. 6.10% of 480 =
  7. 7.15% of 120 =
  8. 8.20% of 710 =
  9. 9.15% of 390 =
  10. 10.10% of 200 =
  11. 11.1% of 740 =
  12. 12.5% of 830 =
  13. 13.20% of 30 =
  14. 14.50% of 560 =
  15. 15.5% of 450 =
  16. 16.25% of 210 =
  17. 17.5% of 510 =
  18. 18.50% of 510 =
  19. 19.5% of 820 =
  20. 20.1% of 890 =
  21. 21.10% of 510 =
  22. 22.1% of 220 =
  23. 23.50% of 210 =
  24. 24.10% of 900 =
  25. 25.10% of 410 =
  26. 26.25% of 210 =
  27. 27.20% of 240 =
  28. 28.10% of 530 =
  29. 29.15% of 900 =
  30. 30.25% of 750 =
  31. 31.25% of 130 =
  32. 32.5% of 370 =
  33. 33.10% of 370 =
  34. 34.10% of 840 =
  35. 35.20% of 180 =
  36. 36.50% of 270 =
  37. 37.20% of 870 =
  38. 38.1% of 220 =
  39. 39.50% of 540 =
  40. 40.25% of 870 =

Answer key

  1. 13.5
  2. 212.5
  3. 34.5
  4. 0.8
  5. 8
  6. 48
  7. 18
  8. 142
  9. 58.5
  10. 20
  11. 7.4
  12. 41.5
  13. 6
  14. 280
  15. 22.5
  16. 52.5
  17. 25.5
  18. 255
  19. 41
  20. 8.9
  21. 51
  22. 2.2
  23. 105
  24. 90
  25. 41
  26. 52.5
  27. 48
  28. 53
  29. 135
  30. 187.5
  31. 32.5
  32. 18.5
  33. 37
  34. 84
  35. 36
  36. 135
  37. 174
  38. 2.2
  39. 270
  40. 217.5

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