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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 579 · 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. 1.5% of 90 =
  2. 2.20% of 250 =
  3. 3.5% of 510 =
  4. 4.10% of 460 =
  5. 5.50% of 620 =
  6. 6.15% of 730 =
  7. 7.50% of 480 =
  8. 8.1% of 150 =
  9. 9.50% of 800 =
  10. 10.1% of 430 =
  11. 11.15% of 820 =
  12. 12.15% of 90 =
  13. 13.1% of 200 =
  14. 14.25% of 580 =
  15. 15.1% of 440 =
  16. 16.5% of 700 =
  17. 17.10% of 840 =
  18. 18.5% of 40 =
  19. 19.5% of 720 =
  20. 20.10% of 290 =
  21. 21.10% of 40 =
  22. 22.5% of 740 =
  23. 23.50% of 510 =
  24. 24.1% of 470 =
  25. 25.5% of 310 =
  26. 26.10% of 880 =
  27. 27.1% of 460 =
  28. 28.10% of 40 =
  29. 29.25% of 60 =
  30. 30.20% of 140 =
  31. 31.50% of 610 =
  32. 32.5% of 50 =
  33. 33.25% of 250 =
  34. 34.20% of 90 =
  35. 35.25% of 310 =
  36. 36.25% of 710 =
  37. 37.5% of 650 =
  38. 38.25% of 830 =
  39. 39.50% of 280 =
  40. 40.1% of 570 =

Answer key

  1. 4.5
  2. 50
  3. 25.5
  4. 46
  5. 310
  6. 109.5
  7. 240
  8. 1.5
  9. 400
  10. 4.3
  11. 123
  12. 13.5
  13. 2
  14. 145
  15. 4.4
  16. 35
  17. 84
  18. 2
  19. 36
  20. 29
  21. 4
  22. 37
  23. 255
  24. 4.7
  25. 15.5
  26. 88
  27. 4.6
  28. 4
  29. 15
  30. 28
  31. 305
  32. 2.5
  33. 62.5
  34. 18
  35. 77.5
  36. 177.5
  37. 32.5
  38. 207.5
  39. 140
  40. 5.7

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