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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 590 · 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. 1.15% of 90 =
  2. 2.15% of 710 =
  3. 3.50% of 340 =
  4. 4.20% of 340 =
  5. 5.15% of 720 =
  6. 6.25% of 390 =
  7. 7.25% of 360 =
  8. 8.5% of 370 =
  9. 9.15% of 720 =
  10. 10.20% of 700 =
  11. 11.50% of 160 =
  12. 12.25% of 890 =
  13. 13.50% of 790 =
  14. 14.1% of 430 =
  15. 15.15% of 150 =
  16. 16.5% of 210 =
  17. 17.5% of 190 =
  18. 18.15% of 150 =
  19. 19.5% of 290 =
  20. 20.1% of 20 =
  21. 21.50% of 820 =
  22. 22.20% of 750 =
  23. 23.50% of 810 =
  24. 24.5% of 210 =
  25. 25.20% of 790 =
  26. 26.20% of 460 =
  27. 27.5% of 620 =
  28. 28.15% of 360 =
  29. 29.50% of 160 =
  30. 30.10% of 460 =
  31. 31.5% of 870 =
  32. 32.10% of 90 =
  33. 33.5% of 300 =
  34. 34.15% of 620 =
  35. 35.1% of 60 =
  36. 36.50% of 720 =
  37. 37.10% of 350 =
  38. 38.1% of 250 =
  39. 39.25% of 130 =
  40. 40.15% of 130 =

Answer key

  1. 13.5
  2. 106.5
  3. 170
  4. 68
  5. 108
  6. 97.5
  7. 90
  8. 18.5
  9. 108
  10. 140
  11. 80
  12. 222.5
  13. 395
  14. 4.3
  15. 22.5
  16. 10.5
  17. 9.5
  18. 22.5
  19. 14.5
  20. 0.2
  21. 410
  22. 150
  23. 405
  24. 10.5
  25. 158
  26. 92
  27. 31
  28. 54
  29. 80
  30. 46
  31. 43.5
  32. 9
  33. 15
  34. 93
  35. 0.6
  36. 360
  37. 35
  38. 2.5
  39. 32.5
  40. 19.5

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