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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 122 · 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 260 =
  2. 2.10% of 800 =
  3. 3.50% of 630 =
  4. 4.1% of 780 =
  5. 5.15% of 240 =
  6. 6.10% of 250 =
  7. 7.5% of 810 =
  8. 8.1% of 270 =
  9. 9.1% of 820 =
  10. 10.5% of 170 =
  11. 11.5% of 850 =
  12. 12.5% of 620 =
  13. 13.5% of 220 =
  14. 14.10% of 360 =
  15. 15.20% of 300 =
  16. 16.25% of 210 =
  17. 17.50% of 820 =
  18. 18.20% of 50 =
  19. 19.10% of 640 =
  20. 20.10% of 390 =
  21. 21.20% of 440 =
  22. 22.10% of 730 =
  23. 23.10% of 250 =
  24. 24.50% of 280 =
  25. 25.1% of 890 =
  26. 26.50% of 460 =
  27. 27.25% of 850 =
  28. 28.1% of 230 =
  29. 29.5% of 220 =
  30. 30.50% of 20 =
  31. 31.1% of 170 =
  32. 32.5% of 210 =
  33. 33.25% of 340 =
  34. 34.15% of 780 =
  35. 35.20% of 270 =
  36. 36.25% of 700 =
  37. 37.5% of 840 =
  38. 38.5% of 80 =
  39. 39.15% of 890 =
  40. 40.15% of 200 =

Answer key

  1. 65
  2. 80
  3. 315
  4. 7.8
  5. 36
  6. 25
  7. 40.5
  8. 2.7
  9. 8.2
  10. 8.5
  11. 42.5
  12. 31
  13. 11
  14. 36
  15. 60
  16. 52.5
  17. 410
  18. 10
  19. 64
  20. 39
  21. 88
  22. 73
  23. 25
  24. 140
  25. 8.9
  26. 230
  27. 212.5
  28. 2.3
  29. 11
  30. 10
  31. 1.7
  32. 10.5
  33. 85
  34. 117
  35. 54
  36. 175
  37. 42
  38. 4
  39. 133.5
  40. 30

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