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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 750 · 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 90 =
  2. 2.25% of 100 =
  3. 3.10% of 40 =
  4. 4.25% of 260 =
  5. 5.10% of 840 =
  6. 6.10% of 480 =
  7. 7.15% of 70 =
  8. 8.10% of 660 =
  9. 9.25% of 530 =
  10. 10.15% of 900 =
  11. 11.5% of 180 =
  12. 12.15% of 550 =
  13. 13.10% of 290 =
  14. 14.5% of 520 =
  15. 15.50% of 340 =
  16. 16.1% of 550 =
  17. 17.5% of 890 =
  18. 18.10% of 190 =
  19. 19.25% of 100 =
  20. 20.5% of 790 =
  21. 21.20% of 340 =
  22. 22.1% of 550 =
  23. 23.10% of 290 =
  24. 24.25% of 760 =
  25. 25.25% of 520 =
  26. 26.25% of 190 =
  27. 27.1% of 780 =
  28. 28.25% of 560 =
  29. 29.25% of 500 =
  30. 30.10% of 770 =
  31. 31.50% of 30 =
  32. 32.25% of 680 =
  33. 33.15% of 40 =
  34. 34.5% of 850 =
  35. 35.20% of 200 =
  36. 36.15% of 750 =
  37. 37.25% of 490 =
  38. 38.5% of 60 =
  39. 39.5% of 540 =
  40. 40.10% of 70 =

Answer key

  1. 22.5
  2. 25
  3. 4
  4. 65
  5. 84
  6. 48
  7. 10.5
  8. 66
  9. 132.5
  10. 135
  11. 9
  12. 82.5
  13. 29
  14. 26
  15. 170
  16. 5.5
  17. 44.5
  18. 19
  19. 25
  20. 39.5
  21. 68
  22. 5.5
  23. 29
  24. 190
  25. 130
  26. 47.5
  27. 7.8
  28. 140
  29. 125
  30. 77
  31. 15
  32. 170
  33. 6
  34. 42.5
  35. 40
  36. 112.5
  37. 122.5
  38. 3
  39. 27
  40. 7

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