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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 454 · 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. 1.50% of 660 =
  2. 2.1% of 70 =
  3. 3.15% of 570 =
  4. 4.1% of 500 =
  5. 5.1% of 520 =
  6. 6.50% of 20 =
  7. 7.25% of 320 =
  8. 8.50% of 850 =
  9. 9.5% of 270 =
  10. 10.15% of 310 =
  11. 11.1% of 170 =
  12. 12.25% of 350 =
  13. 13.25% of 260 =
  14. 14.15% of 320 =
  15. 15.50% of 540 =
  16. 16.20% of 260 =
  17. 17.25% of 500 =
  18. 18.20% of 710 =
  19. 19.10% of 140 =
  20. 20.1% of 700 =
  21. 21.5% of 750 =
  22. 22.20% of 390 =
  23. 23.1% of 460 =
  24. 24.5% of 520 =
  25. 25.50% of 490 =
  26. 26.50% of 40 =
  27. 27.25% of 230 =
  28. 28.50% of 890 =
  29. 29.5% of 240 =
  30. 30.1% of 820 =
  31. 31.10% of 540 =
  32. 32.15% of 470 =
  33. 33.1% of 450 =
  34. 34.50% of 470 =
  35. 35.15% of 150 =
  36. 36.1% of 580 =
  37. 37.5% of 840 =
  38. 38.20% of 890 =
  39. 39.5% of 710 =
  40. 40.25% of 280 =

Answer key

  1. 330
  2. 0.7
  3. 85.5
  4. 5
  5. 5.2
  6. 10
  7. 80
  8. 425
  9. 13.5
  10. 46.5
  11. 1.7
  12. 87.5
  13. 65
  14. 48
  15. 270
  16. 52
  17. 125
  18. 142
  19. 14
  20. 7
  21. 37.5
  22. 78
  23. 4.6
  24. 26
  25. 245
  26. 20
  27. 57.5
  28. 445
  29. 12
  30. 8.2
  31. 54
  32. 70.5
  33. 4.5
  34. 235
  35. 22.5
  36. 5.8
  37. 42
  38. 178
  39. 35.5
  40. 70

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