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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 464 · 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. 2.5% of 550 =
  3. 3.50% of 420 =
  4. 4.50% of 140 =
  5. 5.50% of 630 =
  6. 6.15% of 780 =
  7. 7.25% of 140 =
  8. 8.5% of 570 =
  9. 9.25% of 780 =
  10. 10.50% of 870 =
  11. 11.50% of 80 =
  12. 12.5% of 140 =
  13. 13.20% of 350 =
  14. 14.20% of 890 =
  15. 15.1% of 760 =
  16. 16.50% of 170 =
  17. 17.15% of 130 =
  18. 18.20% of 250 =
  19. 19.10% of 170 =
  20. 20.10% of 250 =
  21. 21.1% of 620 =
  22. 22.5% of 370 =
  23. 23.5% of 770 =
  24. 24.5% of 100 =
  25. 25.25% of 430 =
  26. 26.5% of 210 =
  27. 27.5% of 170 =
  28. 28.10% of 450 =
  29. 29.25% of 750 =
  30. 30.5% of 500 =
  31. 31.5% of 400 =
  32. 32.20% of 270 =
  33. 33.25% of 410 =
  34. 34.25% of 430 =
  35. 35.20% of 360 =
  36. 36.50% of 150 =
  37. 37.10% of 750 =
  38. 38.25% of 240 =
  39. 39.25% of 160 =
  40. 40.5% of 30 =

Answer key

  1. 80
  2. 27.5
  3. 210
  4. 70
  5. 315
  6. 117
  7. 35
  8. 28.5
  9. 195
  10. 435
  11. 40
  12. 7
  13. 70
  14. 178
  15. 7.6
  16. 85
  17. 19.5
  18. 50
  19. 17
  20. 25
  21. 6.2
  22. 18.5
  23. 38.5
  24. 5
  25. 107.5
  26. 10.5
  27. 8.5
  28. 45
  29. 187.5
  30. 25
  31. 20
  32. 54
  33. 102.5
  34. 107.5
  35. 72
  36. 75
  37. 75
  38. 60
  39. 40
  40. 1.5

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