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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 218 · 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 250 =
  2. 2.5% of 230 =
  3. 3.1% of 300 =
  4. 4.50% of 780 =
  5. 5.10% of 150 =
  6. 6.1% of 130 =
  7. 7.20% of 570 =
  8. 8.10% of 730 =
  9. 9.10% of 30 =
  10. 10.15% of 300 =
  11. 11.20% of 420 =
  12. 12.25% of 80 =
  13. 13.50% of 310 =
  14. 14.50% of 160 =
  15. 15.10% of 770 =
  16. 16.10% of 890 =
  17. 17.5% of 130 =
  18. 18.50% of 830 =
  19. 19.10% of 500 =
  20. 20.15% of 320 =
  21. 21.20% of 330 =
  22. 22.20% of 770 =
  23. 23.25% of 320 =
  24. 24.1% of 610 =
  25. 25.15% of 220 =
  26. 26.10% of 100 =
  27. 27.50% of 480 =
  28. 28.10% of 250 =
  29. 29.10% of 790 =
  30. 30.10% of 870 =
  31. 31.5% of 120 =
  32. 32.5% of 810 =
  33. 33.10% of 420 =
  34. 34.5% of 110 =
  35. 35.25% of 160 =
  36. 36.5% of 830 =
  37. 37.10% of 100 =
  38. 38.50% of 650 =
  39. 39.15% of 810 =
  40. 40.1% of 20 =

Answer key

  1. 2.5
  2. 11.5
  3. 3
  4. 390
  5. 15
  6. 1.3
  7. 114
  8. 73
  9. 3
  10. 45
  11. 84
  12. 20
  13. 155
  14. 80
  15. 77
  16. 89
  17. 6.5
  18. 415
  19. 50
  20. 48
  21. 66
  22. 154
  23. 80
  24. 6.1
  25. 33
  26. 10
  27. 240
  28. 25
  29. 79
  30. 87
  31. 6
  32. 40.5
  33. 42
  34. 5.5
  35. 40
  36. 41.5
  37. 10
  38. 325
  39. 121.5
  40. 0.2

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