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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 812 · 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. 1.50% of 900 =
  2. 2.10% of 870 =
  3. 3.10% of 790 =
  4. 4.25% of 720 =
  5. 5.50% of 830 =
  6. 6.10% of 810 =
  7. 7.15% of 810 =
  8. 8.5% of 730 =
  9. 9.20% of 360 =
  10. 10.15% of 640 =
  11. 11.25% of 110 =
  12. 12.15% of 590 =
  13. 13.1% of 450 =
  14. 14.10% of 420 =
  15. 15.1% of 860 =
  16. 16.20% of 630 =
  17. 17.10% of 170 =
  18. 18.5% of 140 =
  19. 19.1% of 810 =
  20. 20.1% of 340 =
  21. 21.10% of 180 =
  22. 22.15% of 440 =
  23. 23.5% of 490 =
  24. 24.20% of 370 =
  25. 25.15% of 80 =
  26. 26.15% of 700 =
  27. 27.50% of 550 =
  28. 28.20% of 330 =
  29. 29.15% of 20 =
  30. 30.1% of 820 =
  31. 31.20% of 770 =
  32. 32.5% of 160 =
  33. 33.10% of 680 =
  34. 34.1% of 190 =
  35. 35.15% of 900 =
  36. 36.1% of 620 =
  37. 37.5% of 830 =
  38. 38.25% of 590 =
  39. 39.25% of 710 =
  40. 40.5% of 60 =

Answer key

  1. 450
  2. 87
  3. 79
  4. 180
  5. 415
  6. 81
  7. 121.5
  8. 36.5
  9. 72
  10. 96
  11. 27.5
  12. 88.5
  13. 4.5
  14. 42
  15. 8.6
  16. 126
  17. 17
  18. 7
  19. 8.1
  20. 3.4
  21. 18
  22. 66
  23. 24.5
  24. 74
  25. 12
  26. 105
  27. 275
  28. 66
  29. 3
  30. 8.2
  31. 154
  32. 8
  33. 68
  34. 1.9
  35. 135
  36. 6.2
  37. 41.5
  38. 147.5
  39. 177.5
  40. 3

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