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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 527 · 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 360 =
  2. 2.5% of 450 =
  3. 3.20% of 850 =
  4. 4.20% of 360 =
  5. 5.25% of 860 =
  6. 6.50% of 740 =
  7. 7.15% of 30 =
  8. 8.20% of 20 =
  9. 9.15% of 580 =
  10. 10.5% of 490 =
  11. 11.5% of 390 =
  12. 12.10% of 470 =
  13. 13.10% of 680 =
  14. 14.5% of 710 =
  15. 15.20% of 650 =
  16. 16.5% of 640 =
  17. 17.5% of 150 =
  18. 18.20% of 100 =
  19. 19.25% of 30 =
  20. 20.10% of 640 =
  21. 21.5% of 500 =
  22. 22.15% of 780 =
  23. 23.20% of 120 =
  24. 24.25% of 140 =
  25. 25.15% of 600 =
  26. 26.1% of 670 =
  27. 27.25% of 190 =
  28. 28.5% of 120 =
  29. 29.15% of 870 =
  30. 30.10% of 560 =
  31. 31.5% of 850 =
  32. 32.1% of 600 =
  33. 33.5% of 100 =
  34. 34.5% of 200 =
  35. 35.15% of 470 =
  36. 36.10% of 140 =
  37. 37.5% of 100 =
  38. 38.1% of 880 =
  39. 39.5% of 410 =
  40. 40.5% of 290 =

Answer key

  1. 36
  2. 22.5
  3. 170
  4. 72
  5. 215
  6. 370
  7. 4.5
  8. 4
  9. 87
  10. 24.5
  11. 19.5
  12. 47
  13. 68
  14. 35.5
  15. 130
  16. 32
  17. 7.5
  18. 20
  19. 7.5
  20. 64
  21. 25
  22. 117
  23. 24
  24. 35
  25. 90
  26. 6.7
  27. 47.5
  28. 6
  29. 130.5
  30. 56
  31. 42.5
  32. 6
  33. 5
  34. 10
  35. 70.5
  36. 14
  37. 5
  38. 8.8
  39. 20.5
  40. 14.5

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