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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 3 · 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. 1.20% of 850 =
  2. 2.50% of 350 =
  3. 3.20% of 710 =
  4. 4.1% of 500 =
  5. 5.20% of 210 =
  6. 6.5% of 390 =
  7. 7.10% of 870 =
  8. 8.20% of 390 =
  9. 9.15% of 890 =
  10. 10.1% of 200 =
  11. 11.25% of 240 =
  12. 12.5% of 900 =
  13. 13.10% of 450 =
  14. 14.25% of 200 =
  15. 15.15% of 140 =
  16. 16.1% of 60 =
  17. 17.10% of 720 =
  18. 18.1% of 640 =
  19. 19.50% of 880 =
  20. 20.5% of 430 =
  21. 21.1% of 830 =
  22. 22.1% of 630 =
  23. 23.50% of 80 =
  24. 24.1% of 320 =
  25. 25.15% of 670 =
  26. 26.25% of 40 =
  27. 27.50% of 840 =
  28. 28.1% of 760 =
  29. 29.15% of 50 =
  30. 30.10% of 550 =
  31. 31.1% of 770 =
  32. 32.15% of 20 =
  33. 33.1% of 740 =
  34. 34.5% of 420 =
  35. 35.5% of 420 =
  36. 36.10% of 520 =
  37. 37.10% of 720 =
  38. 38.10% of 460 =
  39. 39.1% of 140 =
  40. 40.20% of 530 =

Answer key

  1. 170
  2. 175
  3. 142
  4. 5
  5. 42
  6. 19.5
  7. 87
  8. 78
  9. 133.5
  10. 2
  11. 60
  12. 45
  13. 45
  14. 50
  15. 21
  16. 0.6
  17. 72
  18. 6.4
  19. 440
  20. 21.5
  21. 8.3
  22. 6.3
  23. 40
  24. 3.2
  25. 100.5
  26. 10
  27. 420
  28. 7.6
  29. 7.5
  30. 55
  31. 7.7
  32. 3
  33. 7.4
  34. 21
  35. 21
  36. 52
  37. 72
  38. 46
  39. 1.4
  40. 106

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