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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 43 · 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. 1.10% of 580 =
  2. 2.25% of 360 =
  3. 3.5% of 90 =
  4. 4.5% of 420 =
  5. 5.5% of 210 =
  6. 6.1% of 600 =
  7. 7.1% of 520 =
  8. 8.15% of 270 =
  9. 9.50% of 90 =
  10. 10.25% of 60 =
  11. 11.5% of 20 =
  12. 12.15% of 810 =
  13. 13.50% of 850 =
  14. 14.5% of 700 =
  15. 15.15% of 490 =
  16. 16.25% of 210 =
  17. 17.10% of 240 =
  18. 18.50% of 150 =
  19. 19.25% of 150 =
  20. 20.10% of 660 =
  21. 21.25% of 370 =
  22. 22.25% of 170 =
  23. 23.5% of 180 =
  24. 24.5% of 430 =
  25. 25.25% of 100 =
  26. 26.25% of 660 =
  27. 27.25% of 830 =
  28. 28.1% of 860 =
  29. 29.10% of 840 =
  30. 30.5% of 430 =
  31. 31.1% of 220 =
  32. 32.20% of 900 =
  33. 33.15% of 220 =
  34. 34.15% of 260 =
  35. 35.50% of 290 =
  36. 36.25% of 190 =
  37. 37.10% of 360 =
  38. 38.5% of 540 =
  39. 39.10% of 840 =
  40. 40.10% of 890 =

Answer key

  1. 58
  2. 90
  3. 4.5
  4. 21
  5. 10.5
  6. 6
  7. 5.2
  8. 40.5
  9. 45
  10. 15
  11. 1
  12. 121.5
  13. 425
  14. 35
  15. 73.5
  16. 52.5
  17. 24
  18. 75
  19. 37.5
  20. 66
  21. 92.5
  22. 42.5
  23. 9
  24. 21.5
  25. 25
  26. 165
  27. 207.5
  28. 8.6
  29. 84
  30. 21.5
  31. 2.2
  32. 180
  33. 33
  34. 39
  35. 145
  36. 47.5
  37. 36
  38. 27
  39. 84
  40. 89

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