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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 449 · 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. 1.1% of 790 =
  2. 2.10% of 260 =
  3. 3.10% of 330 =
  4. 4.1% of 360 =
  5. 5.20% of 200 =
  6. 6.15% of 140 =
  7. 7.20% of 360 =
  8. 8.15% of 190 =
  9. 9.5% of 890 =
  10. 10.10% of 80 =
  11. 11.25% of 510 =
  12. 12.10% of 300 =
  13. 13.5% of 40 =
  14. 14.20% of 190 =
  15. 15.50% of 640 =
  16. 16.20% of 110 =
  17. 17.10% of 700 =
  18. 18.50% of 50 =
  19. 19.15% of 720 =
  20. 20.20% of 110 =
  21. 21.50% of 180 =
  22. 22.15% of 450 =
  23. 23.1% of 170 =
  24. 24.5% of 820 =
  25. 25.5% of 570 =
  26. 26.50% of 880 =
  27. 27.15% of 180 =
  28. 28.5% of 240 =
  29. 29.20% of 610 =
  30. 30.20% of 560 =
  31. 31.15% of 60 =
  32. 32.20% of 460 =
  33. 33.20% of 850 =
  34. 34.50% of 30 =
  35. 35.5% of 210 =
  36. 36.15% of 600 =
  37. 37.25% of 660 =
  38. 38.5% of 720 =
  39. 39.20% of 300 =
  40. 40.15% of 330 =

Answer key

  1. 7.9
  2. 26
  3. 33
  4. 3.6
  5. 40
  6. 21
  7. 72
  8. 28.5
  9. 44.5
  10. 8
  11. 127.5
  12. 30
  13. 2
  14. 38
  15. 320
  16. 22
  17. 70
  18. 25
  19. 108
  20. 22
  21. 90
  22. 67.5
  23. 1.7
  24. 41
  25. 28.5
  26. 440
  27. 27
  28. 12
  29. 122
  30. 112
  31. 9
  32. 92
  33. 170
  34. 15
  35. 10.5
  36. 90
  37. 165
  38. 36
  39. 60
  40. 49.5

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