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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 729 · 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 400 =
  2. 2.25% of 240 =
  3. 3.15% of 480 =
  4. 4.1% of 220 =
  5. 5.50% of 770 =
  6. 6.10% of 710 =
  7. 7.15% of 390 =
  8. 8.50% of 640 =
  9. 9.5% of 470 =
  10. 10.50% of 810 =
  11. 11.20% of 230 =
  12. 12.20% of 500 =
  13. 13.25% of 890 =
  14. 14.25% of 900 =
  15. 15.5% of 580 =
  16. 16.50% of 640 =
  17. 17.5% of 130 =
  18. 18.25% of 380 =
  19. 19.10% of 70 =
  20. 20.10% of 50 =
  21. 21.25% of 100 =
  22. 22.5% of 540 =
  23. 23.5% of 270 =
  24. 24.10% of 630 =
  25. 25.5% of 540 =
  26. 26.5% of 30 =
  27. 27.50% of 150 =
  28. 28.5% of 140 =
  29. 29.10% of 320 =
  30. 30.50% of 120 =
  31. 31.15% of 130 =
  32. 32.20% of 390 =
  33. 33.15% of 360 =
  34. 34.1% of 190 =
  35. 35.1% of 890 =
  36. 36.20% of 190 =
  37. 37.25% of 600 =
  38. 38.20% of 780 =
  39. 39.50% of 460 =
  40. 40.20% of 640 =

Answer key

  1. 20
  2. 60
  3. 72
  4. 2.2
  5. 385
  6. 71
  7. 58.5
  8. 320
  9. 23.5
  10. 405
  11. 46
  12. 100
  13. 222.5
  14. 225
  15. 29
  16. 320
  17. 6.5
  18. 95
  19. 7
  20. 5
  21. 25
  22. 27
  23. 13.5
  24. 63
  25. 27
  26. 1.5
  27. 75
  28. 7
  29. 32
  30. 60
  31. 19.5
  32. 78
  33. 54
  34. 1.9
  35. 8.9
  36. 38
  37. 150
  38. 156
  39. 230
  40. 128

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