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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 601 · 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. 1.25% of 480 =
  2. 2.1% of 210 =
  3. 3.20% of 100 =
  4. 4.5% of 170 =
  5. 5.1% of 840 =
  6. 6.1% of 710 =
  7. 7.5% of 820 =
  8. 8.25% of 900 =
  9. 9.25% of 460 =
  10. 10.10% of 520 =
  11. 11.15% of 290 =
  12. 12.50% of 380 =
  13. 13.25% of 610 =
  14. 14.5% of 880 =
  15. 15.25% of 660 =
  16. 16.25% of 120 =
  17. 17.15% of 620 =
  18. 18.50% of 230 =
  19. 19.1% of 70 =
  20. 20.25% of 270 =
  21. 21.1% of 650 =
  22. 22.20% of 230 =
  23. 23.20% of 160 =
  24. 24.10% of 480 =
  25. 25.10% of 560 =
  26. 26.5% of 820 =
  27. 27.5% of 890 =
  28. 28.5% of 220 =
  29. 29.25% of 760 =
  30. 30.10% of 300 =
  31. 31.5% of 830 =
  32. 32.5% of 640 =
  33. 33.10% of 610 =
  34. 34.10% of 600 =
  35. 35.15% of 600 =
  36. 36.25% of 670 =
  37. 37.10% of 150 =
  38. 38.15% of 580 =
  39. 39.1% of 60 =
  40. 40.25% of 330 =

Answer key

  1. 120
  2. 2.1
  3. 20
  4. 8.5
  5. 8.4
  6. 7.1
  7. 41
  8. 225
  9. 115
  10. 52
  11. 43.5
  12. 190
  13. 152.5
  14. 44
  15. 165
  16. 30
  17. 93
  18. 115
  19. 0.7
  20. 67.5
  21. 6.5
  22. 46
  23. 32
  24. 48
  25. 56
  26. 41
  27. 44.5
  28. 11
  29. 190
  30. 30
  31. 41.5
  32. 32
  33. 61
  34. 60
  35. 90
  36. 167.5
  37. 15
  38. 87
  39. 0.6
  40. 82.5

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