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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 620 · 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 110 =
  2. 2.5% of 140 =
  3. 3.1% of 40 =
  4. 4.50% of 30 =
  5. 5.15% of 520 =
  6. 6.10% of 720 =
  7. 7.5% of 280 =
  8. 8.25% of 120 =
  9. 9.5% of 780 =
  10. 10.10% of 40 =
  11. 11.25% of 70 =
  12. 12.1% of 630 =
  13. 13.25% of 610 =
  14. 14.10% of 890 =
  15. 15.10% of 700 =
  16. 16.5% of 390 =
  17. 17.15% of 640 =
  18. 18.5% of 600 =
  19. 19.25% of 360 =
  20. 20.50% of 900 =
  21. 21.5% of 210 =
  22. 22.10% of 440 =
  23. 23.5% of 420 =
  24. 24.25% of 580 =
  25. 25.10% of 90 =
  26. 26.25% of 310 =
  27. 27.10% of 360 =
  28. 28.20% of 560 =
  29. 29.5% of 460 =
  30. 30.50% of 700 =
  31. 31.25% of 110 =
  32. 32.20% of 600 =
  33. 33.10% of 240 =
  34. 34.20% of 100 =
  35. 35.5% of 790 =
  36. 36.1% of 240 =
  37. 37.5% of 120 =
  38. 38.10% of 310 =
  39. 39.20% of 610 =
  40. 40.20% of 860 =

Answer key

  1. 55
  2. 7
  3. 0.4
  4. 15
  5. 78
  6. 72
  7. 14
  8. 30
  9. 39
  10. 4
  11. 17.5
  12. 6.3
  13. 152.5
  14. 89
  15. 70
  16. 19.5
  17. 96
  18. 30
  19. 90
  20. 450
  21. 10.5
  22. 44
  23. 21
  24. 145
  25. 9
  26. 77.5
  27. 36
  28. 112
  29. 23
  30. 350
  31. 27.5
  32. 120
  33. 24
  34. 20
  35. 39.5
  36. 2.4
  37. 6
  38. 31
  39. 122
  40. 172

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