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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 474 · 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. 1.20% of 400 =
  2. 2.1% of 40 =
  3. 3.10% of 270 =
  4. 4.5% of 850 =
  5. 5.15% of 270 =
  6. 6.50% of 480 =
  7. 7.20% of 70 =
  8. 8.10% of 350 =
  9. 9.5% of 390 =
  10. 10.25% of 470 =
  11. 11.5% of 860 =
  12. 12.5% of 580 =
  13. 13.50% of 470 =
  14. 14.20% of 80 =
  15. 15.20% of 290 =
  16. 16.5% of 290 =
  17. 17.10% of 650 =
  18. 18.25% of 480 =
  19. 19.5% of 900 =
  20. 20.1% of 500 =
  21. 21.15% of 660 =
  22. 22.20% of 340 =
  23. 23.15% of 120 =
  24. 24.20% of 750 =
  25. 25.15% of 540 =
  26. 26.5% of 110 =
  27. 27.15% of 300 =
  28. 28.10% of 730 =
  29. 29.5% of 590 =
  30. 30.15% of 250 =
  31. 31.5% of 300 =
  32. 32.15% of 150 =
  33. 33.1% of 260 =
  34. 34.25% of 520 =
  35. 35.10% of 470 =
  36. 36.10% of 390 =
  37. 37.25% of 340 =
  38. 38.1% of 850 =
  39. 39.50% of 290 =
  40. 40.1% of 860 =

Answer key

  1. 80
  2. 0.4
  3. 27
  4. 42.5
  5. 40.5
  6. 240
  7. 14
  8. 35
  9. 19.5
  10. 117.5
  11. 43
  12. 29
  13. 235
  14. 16
  15. 58
  16. 14.5
  17. 65
  18. 120
  19. 45
  20. 5
  21. 99
  22. 68
  23. 18
  24. 150
  25. 81
  26. 5.5
  27. 45
  28. 73
  29. 29.5
  30. 37.5
  31. 15
  32. 22.5
  33. 2.6
  34. 130
  35. 47
  36. 39
  37. 85
  38. 8.5
  39. 145
  40. 8.6

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