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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 712 · 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 810 =
  2. 2.5% of 50 =
  3. 3.15% of 590 =
  4. 4.10% of 600 =
  5. 5.10% of 170 =
  6. 6.5% of 310 =
  7. 7.5% of 360 =
  8. 8.10% of 330 =
  9. 9.15% of 60 =
  10. 10.1% of 760 =
  11. 11.5% of 890 =
  12. 12.15% of 360 =
  13. 13.1% of 130 =
  14. 14.5% of 330 =
  15. 15.10% of 640 =
  16. 16.1% of 610 =
  17. 17.25% of 200 =
  18. 18.15% of 670 =
  19. 19.5% of 440 =
  20. 20.20% of 790 =
  21. 21.10% of 660 =
  22. 22.5% of 350 =
  23. 23.25% of 130 =
  24. 24.15% of 140 =
  25. 25.10% of 660 =
  26. 26.50% of 650 =
  27. 27.15% of 840 =
  28. 28.25% of 570 =
  29. 29.5% of 100 =
  30. 30.5% of 560 =
  31. 31.5% of 140 =
  32. 32.5% of 40 =
  33. 33.50% of 480 =
  34. 34.10% of 880 =
  35. 35.10% of 690 =
  36. 36.50% of 70 =
  37. 37.50% of 690 =
  38. 38.50% of 300 =
  39. 39.50% of 40 =
  40. 40.25% of 170 =

Answer key

  1. 202.5
  2. 2.5
  3. 88.5
  4. 60
  5. 17
  6. 15.5
  7. 18
  8. 33
  9. 9
  10. 7.6
  11. 44.5
  12. 54
  13. 1.3
  14. 16.5
  15. 64
  16. 6.1
  17. 50
  18. 100.5
  19. 22
  20. 158
  21. 66
  22. 17.5
  23. 32.5
  24. 21
  25. 66
  26. 325
  27. 126
  28. 142.5
  29. 5
  30. 28
  31. 7
  32. 2
  33. 240
  34. 88
  35. 69
  36. 35
  37. 345
  38. 150
  39. 20
  40. 42.5

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