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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 546 · 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 720 =
  2. 2.10% of 610 =
  3. 3.25% of 590 =
  4. 4.50% of 20 =
  5. 5.5% of 100 =
  6. 6.1% of 30 =
  7. 7.1% of 830 =
  8. 8.1% of 600 =
  9. 9.5% of 600 =
  10. 10.25% of 630 =
  11. 11.5% of 360 =
  12. 12.5% of 410 =
  13. 13.20% of 300 =
  14. 14.15% of 210 =
  15. 15.50% of 670 =
  16. 16.50% of 210 =
  17. 17.20% of 350 =
  18. 18.25% of 110 =
  19. 19.50% of 690 =
  20. 20.20% of 440 =
  21. 21.50% of 400 =
  22. 22.25% of 110 =
  23. 23.5% of 480 =
  24. 24.25% of 740 =
  25. 25.5% of 800 =
  26. 26.5% of 420 =
  27. 27.10% of 510 =
  28. 28.20% of 70 =
  29. 29.20% of 100 =
  30. 30.20% of 320 =
  31. 31.10% of 60 =
  32. 32.1% of 830 =
  33. 33.5% of 760 =
  34. 34.50% of 700 =
  35. 35.15% of 190 =
  36. 36.1% of 500 =
  37. 37.5% of 250 =
  38. 38.50% of 190 =
  39. 39.1% of 450 =
  40. 40.10% of 510 =

Answer key

  1. 36
  2. 61
  3. 147.5
  4. 10
  5. 5
  6. 0.3
  7. 8.3
  8. 6
  9. 30
  10. 157.5
  11. 18
  12. 20.5
  13. 60
  14. 31.5
  15. 335
  16. 105
  17. 70
  18. 27.5
  19. 345
  20. 88
  21. 200
  22. 27.5
  23. 24
  24. 185
  25. 40
  26. 21
  27. 51
  28. 14
  29. 20
  30. 64
  31. 6
  32. 8.3
  33. 38
  34. 350
  35. 28.5
  36. 5
  37. 12.5
  38. 95
  39. 4.5
  40. 51

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