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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 131 · 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 770 =
  2. 2.20% of 670 =
  3. 3.5% of 260 =
  4. 4.20% of 540 =
  5. 5.25% of 400 =
  6. 6.25% of 770 =
  7. 7.15% of 350 =
  8. 8.20% of 280 =
  9. 9.25% of 280 =
  10. 10.1% of 870 =
  11. 11.1% of 830 =
  12. 12.5% of 740 =
  13. 13.1% of 880 =
  14. 14.25% of 580 =
  15. 15.10% of 30 =
  16. 16.50% of 150 =
  17. 17.50% of 330 =
  18. 18.5% of 840 =
  19. 19.1% of 640 =
  20. 20.25% of 700 =
  21. 21.10% of 100 =
  22. 22.5% of 780 =
  23. 23.1% of 540 =
  24. 24.15% of 560 =
  25. 25.5% of 880 =
  26. 26.1% of 130 =
  27. 27.50% of 770 =
  28. 28.5% of 690 =
  29. 29.15% of 90 =
  30. 30.10% of 550 =
  31. 31.1% of 150 =
  32. 32.50% of 800 =
  33. 33.15% of 650 =
  34. 34.25% of 720 =
  35. 35.10% of 240 =
  36. 36.10% of 640 =
  37. 37.5% of 840 =
  38. 38.10% of 470 =
  39. 39.15% of 640 =
  40. 40.5% of 330 =

Answer key

  1. 192.5
  2. 134
  3. 13
  4. 108
  5. 100
  6. 192.5
  7. 52.5
  8. 56
  9. 70
  10. 8.7
  11. 8.3
  12. 37
  13. 8.8
  14. 145
  15. 3
  16. 75
  17. 165
  18. 42
  19. 6.4
  20. 175
  21. 10
  22. 39
  23. 5.4
  24. 84
  25. 44
  26. 1.3
  27. 385
  28. 34.5
  29. 13.5
  30. 55
  31. 1.5
  32. 400
  33. 97.5
  34. 180
  35. 24
  36. 64
  37. 42
  38. 47
  39. 96
  40. 16.5

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