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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 770 · 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 320 =
  2. 2.50% of 250 =
  3. 3.15% of 370 =
  4. 4.5% of 440 =
  5. 5.1% of 720 =
  6. 6.10% of 50 =
  7. 7.15% of 570 =
  8. 8.5% of 270 =
  9. 9.50% of 670 =
  10. 10.10% of 350 =
  11. 11.10% of 480 =
  12. 12.5% of 550 =
  13. 13.15% of 370 =
  14. 14.20% of 670 =
  15. 15.50% of 440 =
  16. 16.50% of 410 =
  17. 17.15% of 130 =
  18. 18.15% of 150 =
  19. 19.50% of 780 =
  20. 20.10% of 840 =
  21. 21.50% of 800 =
  22. 22.50% of 800 =
  23. 23.10% of 620 =
  24. 24.15% of 760 =
  25. 25.1% of 80 =
  26. 26.1% of 440 =
  27. 27.1% of 150 =
  28. 28.15% of 360 =
  29. 29.15% of 440 =
  30. 30.15% of 230 =
  31. 31.20% of 530 =
  32. 32.10% of 50 =
  33. 33.10% of 290 =
  34. 34.15% of 290 =
  35. 35.50% of 180 =
  36. 36.5% of 880 =
  37. 37.15% of 150 =
  38. 38.15% of 620 =
  39. 39.25% of 390 =
  40. 40.10% of 30 =

Answer key

  1. 80
  2. 125
  3. 55.5
  4. 22
  5. 7.2
  6. 5
  7. 85.5
  8. 13.5
  9. 335
  10. 35
  11. 48
  12. 27.5
  13. 55.5
  14. 134
  15. 220
  16. 205
  17. 19.5
  18. 22.5
  19. 390
  20. 84
  21. 400
  22. 400
  23. 62
  24. 114
  25. 0.8
  26. 4.4
  27. 1.5
  28. 54
  29. 66
  30. 34.5
  31. 106
  32. 5
  33. 29
  34. 43.5
  35. 90
  36. 44
  37. 22.5
  38. 93
  39. 97.5
  40. 3

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