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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 514 · 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 480 =
  2. 2.15% of 810 =
  3. 3.10% of 710 =
  4. 4.15% of 680 =
  5. 5.10% of 360 =
  6. 6.15% of 120 =
  7. 7.15% of 540 =
  8. 8.25% of 780 =
  9. 9.20% of 400 =
  10. 10.5% of 640 =
  11. 11.1% of 640 =
  12. 12.50% of 110 =
  13. 13.10% of 830 =
  14. 14.5% of 600 =
  15. 15.1% of 810 =
  16. 16.1% of 150 =
  17. 17.25% of 900 =
  18. 18.1% of 650 =
  19. 19.20% of 30 =
  20. 20.20% of 720 =
  21. 21.50% of 240 =
  22. 22.25% of 260 =
  23. 23.1% of 130 =
  24. 24.20% of 20 =
  25. 25.20% of 20 =
  26. 26.1% of 40 =
  27. 27.10% of 890 =
  28. 28.10% of 870 =
  29. 29.50% of 690 =
  30. 30.20% of 100 =
  31. 31.10% of 640 =
  32. 32.25% of 570 =
  33. 33.50% of 120 =
  34. 34.15% of 650 =
  35. 35.15% of 810 =
  36. 36.20% of 190 =
  37. 37.50% of 500 =
  38. 38.10% of 100 =
  39. 39.5% of 210 =
  40. 40.10% of 290 =

Answer key

  1. 48
  2. 121.5
  3. 71
  4. 102
  5. 36
  6. 18
  7. 81
  8. 195
  9. 80
  10. 32
  11. 6.4
  12. 55
  13. 83
  14. 30
  15. 8.1
  16. 1.5
  17. 225
  18. 6.5
  19. 6
  20. 144
  21. 120
  22. 65
  23. 1.3
  24. 4
  25. 4
  26. 0.4
  27. 89
  28. 87
  29. 345
  30. 20
  31. 64
  32. 142.5
  33. 60
  34. 97.5
  35. 121.5
  36. 38
  37. 250
  38. 10
  39. 10.5
  40. 29

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