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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 575 · 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. 1.50% of 810 =
  2. 2.50% of 70 =
  3. 3.5% of 180 =
  4. 4.50% of 460 =
  5. 5.10% of 590 =
  6. 6.25% of 250 =
  7. 7.15% of 470 =
  8. 8.1% of 240 =
  9. 9.25% of 690 =
  10. 10.10% of 710 =
  11. 11.20% of 550 =
  12. 12.50% of 900 =
  13. 13.25% of 890 =
  14. 14.25% of 410 =
  15. 15.5% of 600 =
  16. 16.20% of 820 =
  17. 17.1% of 410 =
  18. 18.50% of 790 =
  19. 19.15% of 210 =
  20. 20.20% of 340 =
  21. 21.20% of 500 =
  22. 22.10% of 590 =
  23. 23.1% of 890 =
  24. 24.50% of 110 =
  25. 25.10% of 540 =
  26. 26.25% of 60 =
  27. 27.15% of 240 =
  28. 28.10% of 60 =
  29. 29.25% of 130 =
  30. 30.10% of 690 =
  31. 31.10% of 150 =
  32. 32.15% of 680 =
  33. 33.10% of 200 =
  34. 34.5% of 240 =
  35. 35.15% of 160 =
  36. 36.15% of 570 =
  37. 37.15% of 20 =
  38. 38.50% of 50 =
  39. 39.50% of 330 =
  40. 40.15% of 750 =

Answer key

  1. 405
  2. 35
  3. 9
  4. 230
  5. 59
  6. 62.5
  7. 70.5
  8. 2.4
  9. 172.5
  10. 71
  11. 110
  12. 450
  13. 222.5
  14. 102.5
  15. 30
  16. 164
  17. 4.1
  18. 395
  19. 31.5
  20. 68
  21. 100
  22. 59
  23. 8.9
  24. 55
  25. 54
  26. 15
  27. 36
  28. 6
  29. 32.5
  30. 69
  31. 15
  32. 102
  33. 20
  34. 12
  35. 24
  36. 85.5
  37. 3
  38. 25
  39. 165
  40. 112.5

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