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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 769 · 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 220 =
  2. 2.5% of 710 =
  3. 3.1% of 290 =
  4. 4.20% of 70 =
  5. 5.15% of 450 =
  6. 6.15% of 50 =
  7. 7.1% of 890 =
  8. 8.20% of 210 =
  9. 9.25% of 380 =
  10. 10.15% of 400 =
  11. 11.10% of 120 =
  12. 12.50% of 370 =
  13. 13.5% of 220 =
  14. 14.20% of 720 =
  15. 15.5% of 880 =
  16. 16.5% of 760 =
  17. 17.15% of 670 =
  18. 18.25% of 300 =
  19. 19.15% of 110 =
  20. 20.20% of 690 =
  21. 21.20% of 150 =
  22. 22.10% of 820 =
  23. 23.20% of 540 =
  24. 24.50% of 180 =
  25. 25.50% of 370 =
  26. 26.15% of 850 =
  27. 27.5% of 420 =
  28. 28.5% of 280 =
  29. 29.1% of 780 =
  30. 30.25% of 250 =
  31. 31.10% of 620 =
  32. 32.20% of 30 =
  33. 33.1% of 90 =
  34. 34.50% of 510 =
  35. 35.25% of 450 =
  36. 36.20% of 290 =
  37. 37.15% of 560 =
  38. 38.15% of 610 =
  39. 39.50% of 770 =
  40. 40.10% of 360 =

Answer key

  1. 44
  2. 35.5
  3. 2.9
  4. 14
  5. 67.5
  6. 7.5
  7. 8.9
  8. 42
  9. 95
  10. 60
  11. 12
  12. 185
  13. 11
  14. 144
  15. 44
  16. 38
  17. 100.5
  18. 75
  19. 16.5
  20. 138
  21. 30
  22. 82
  23. 108
  24. 90
  25. 185
  26. 127.5
  27. 21
  28. 14
  29. 7.8
  30. 62.5
  31. 62
  32. 6
  33. 0.9
  34. 255
  35. 112.5
  36. 58
  37. 84
  38. 91.5
  39. 385
  40. 36

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