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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 673 · 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. 1.5% of 580 =
  2. 2.1% of 50 =
  3. 3.1% of 60 =
  4. 4.15% of 700 =
  5. 5.10% of 320 =
  6. 6.25% of 70 =
  7. 7.1% of 600 =
  8. 8.50% of 490 =
  9. 9.15% of 370 =
  10. 10.20% of 400 =
  11. 11.20% of 270 =
  12. 12.20% of 340 =
  13. 13.10% of 760 =
  14. 14.25% of 670 =
  15. 15.10% of 800 =
  16. 16.20% of 150 =
  17. 17.20% of 740 =
  18. 18.50% of 700 =
  19. 19.5% of 690 =
  20. 20.1% of 120 =
  21. 21.15% of 40 =
  22. 22.20% of 250 =
  23. 23.5% of 130 =
  24. 24.10% of 780 =
  25. 25.50% of 280 =
  26. 26.10% of 430 =
  27. 27.1% of 630 =
  28. 28.25% of 250 =
  29. 29.5% of 700 =
  30. 30.50% of 470 =
  31. 31.50% of 860 =
  32. 32.20% of 720 =
  33. 33.15% of 230 =
  34. 34.25% of 810 =
  35. 35.50% of 170 =
  36. 36.5% of 540 =
  37. 37.25% of 750 =
  38. 38.10% of 280 =
  39. 39.10% of 250 =
  40. 40.50% of 60 =

Answer key

  1. 29
  2. 0.5
  3. 0.6
  4. 105
  5. 32
  6. 17.5
  7. 6
  8. 245
  9. 55.5
  10. 80
  11. 54
  12. 68
  13. 76
  14. 167.5
  15. 80
  16. 30
  17. 148
  18. 350
  19. 34.5
  20. 1.2
  21. 6
  22. 50
  23. 6.5
  24. 78
  25. 140
  26. 43
  27. 6.3
  28. 62.5
  29. 35
  30. 235
  31. 430
  32. 144
  33. 34.5
  34. 202.5
  35. 85
  36. 27
  37. 187.5
  38. 28
  39. 25
  40. 30

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