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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 16 · 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 390 =
  2. 2.10% of 380 =
  3. 3.20% of 510 =
  4. 4.20% of 850 =
  5. 5.5% of 510 =
  6. 6.50% of 600 =
  7. 7.15% of 500 =
  8. 8.1% of 110 =
  9. 9.5% of 340 =
  10. 10.25% of 860 =
  11. 11.5% of 770 =
  12. 12.50% of 70 =
  13. 13.20% of 580 =
  14. 14.20% of 120 =
  15. 15.20% of 410 =
  16. 16.20% of 210 =
  17. 17.50% of 620 =
  18. 18.10% of 700 =
  19. 19.1% of 580 =
  20. 20.25% of 620 =
  21. 21.1% of 870 =
  22. 22.10% of 720 =
  23. 23.25% of 840 =
  24. 24.10% of 300 =
  25. 25.50% of 400 =
  26. 26.5% of 270 =
  27. 27.1% of 40 =
  28. 28.50% of 90 =
  29. 29.25% of 830 =
  30. 30.1% of 730 =
  31. 31.10% of 320 =
  32. 32.50% of 120 =
  33. 33.10% of 380 =
  34. 34.50% of 710 =
  35. 35.10% of 200 =
  36. 36.10% of 850 =
  37. 37.25% of 390 =
  38. 38.10% of 800 =
  39. 39.5% of 270 =
  40. 40.20% of 830 =

Answer key

  1. 58.5
  2. 38
  3. 102
  4. 170
  5. 25.5
  6. 300
  7. 75
  8. 1.1
  9. 17
  10. 215
  11. 38.5
  12. 35
  13. 116
  14. 24
  15. 82
  16. 42
  17. 310
  18. 70
  19. 5.8
  20. 155
  21. 8.7
  22. 72
  23. 210
  24. 30
  25. 200
  26. 13.5
  27. 0.4
  28. 45
  29. 207.5
  30. 7.3
  31. 32
  32. 60
  33. 38
  34. 355
  35. 20
  36. 85
  37. 97.5
  38. 80
  39. 13.5
  40. 166

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