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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 744 · 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. 1.20% of 280 =
  2. 2.1% of 650 =
  3. 3.15% of 30 =
  4. 4.1% of 680 =
  5. 5.20% of 150 =
  6. 6.5% of 770 =
  7. 7.1% of 750 =
  8. 8.25% of 510 =
  9. 9.10% of 410 =
  10. 10.25% of 40 =
  11. 11.10% of 170 =
  12. 12.50% of 110 =
  13. 13.5% of 510 =
  14. 14.5% of 50 =
  15. 15.5% of 70 =
  16. 16.15% of 790 =
  17. 17.15% of 210 =
  18. 18.20% of 700 =
  19. 19.5% of 800 =
  20. 20.10% of 730 =
  21. 21.10% of 890 =
  22. 22.50% of 810 =
  23. 23.1% of 700 =
  24. 24.15% of 780 =
  25. 25.1% of 110 =
  26. 26.20% of 260 =
  27. 27.50% of 520 =
  28. 28.15% of 330 =
  29. 29.50% of 500 =
  30. 30.5% of 400 =
  31. 31.20% of 540 =
  32. 32.20% of 750 =
  33. 33.25% of 70 =
  34. 34.10% of 120 =
  35. 35.15% of 610 =
  36. 36.20% of 310 =
  37. 37.20% of 20 =
  38. 38.1% of 430 =
  39. 39.1% of 120 =
  40. 40.15% of 320 =

Answer key

  1. 56
  2. 6.5
  3. 4.5
  4. 6.8
  5. 30
  6. 38.5
  7. 7.5
  8. 127.5
  9. 41
  10. 10
  11. 17
  12. 55
  13. 25.5
  14. 2.5
  15. 3.5
  16. 118.5
  17. 31.5
  18. 140
  19. 40
  20. 73
  21. 89
  22. 405
  23. 7
  24. 117
  25. 1.1
  26. 52
  27. 260
  28. 49.5
  29. 250
  30. 20
  31. 108
  32. 150
  33. 17.5
  34. 12
  35. 91.5
  36. 62
  37. 4
  38. 4.3
  39. 1.2
  40. 48

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