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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 955 · 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 880 =
  2. 2.25% of 820 =
  3. 3.15% of 400 =
  4. 4.10% of 780 =
  5. 5.20% of 220 =
  6. 6.10% of 130 =
  7. 7.15% of 600 =
  8. 8.25% of 420 =
  9. 9.1% of 800 =
  10. 10.20% of 70 =
  11. 11.5% of 330 =
  12. 12.1% of 660 =
  13. 13.50% of 420 =
  14. 14.1% of 330 =
  15. 15.10% of 380 =
  16. 16.20% of 370 =
  17. 17.20% of 260 =
  18. 18.10% of 600 =
  19. 19.5% of 450 =
  20. 20.10% of 750 =
  21. 21.5% of 850 =
  22. 22.50% of 20 =
  23. 23.25% of 550 =
  24. 24.25% of 60 =
  25. 25.10% of 650 =
  26. 26.25% of 480 =
  27. 27.50% of 770 =
  28. 28.1% of 570 =
  29. 29.50% of 740 =
  30. 30.1% of 90 =
  31. 31.15% of 30 =
  32. 32.5% of 240 =
  33. 33.20% of 630 =
  34. 34.25% of 360 =
  35. 35.15% of 480 =
  36. 36.15% of 380 =
  37. 37.1% of 540 =
  38. 38.25% of 820 =
  39. 39.5% of 630 =
  40. 40.20% of 380 =

Answer key

  1. 176
  2. 205
  3. 60
  4. 78
  5. 44
  6. 13
  7. 90
  8. 105
  9. 8
  10. 14
  11. 16.5
  12. 6.6
  13. 210
  14. 3.3
  15. 38
  16. 74
  17. 52
  18. 60
  19. 22.5
  20. 75
  21. 42.5
  22. 10
  23. 137.5
  24. 15
  25. 65
  26. 120
  27. 385
  28. 5.7
  29. 370
  30. 0.9
  31. 4.5
  32. 12
  33. 126
  34. 90
  35. 72
  36. 57
  37. 5.4
  38. 205
  39. 31.5
  40. 76

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