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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 505 · 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. 1.1% of 170 =
  2. 2.50% of 40 =
  3. 3.25% of 730 =
  4. 4.1% of 420 =
  5. 5.5% of 750 =
  6. 6.1% of 260 =
  7. 7.1% of 450 =
  8. 8.20% of 370 =
  9. 9.10% of 780 =
  10. 10.1% of 670 =
  11. 11.20% of 810 =
  12. 12.20% of 310 =
  13. 13.25% of 610 =
  14. 14.10% of 30 =
  15. 15.5% of 800 =
  16. 16.20% of 850 =
  17. 17.1% of 780 =
  18. 18.20% of 420 =
  19. 19.1% of 640 =
  20. 20.5% of 650 =
  21. 21.25% of 110 =
  22. 22.5% of 150 =
  23. 23.25% of 780 =
  24. 24.20% of 220 =
  25. 25.25% of 490 =
  26. 26.1% of 160 =
  27. 27.15% of 660 =
  28. 28.15% of 480 =
  29. 29.15% of 570 =
  30. 30.20% of 400 =
  31. 31.10% of 70 =
  32. 32.10% of 760 =
  33. 33.15% of 830 =
  34. 34.20% of 700 =
  35. 35.20% of 540 =
  36. 36.20% of 180 =
  37. 37.20% of 630 =
  38. 38.5% of 510 =
  39. 39.5% of 20 =
  40. 40.25% of 260 =

Answer key

  1. 1.7
  2. 20
  3. 182.5
  4. 4.2
  5. 37.5
  6. 2.6
  7. 4.5
  8. 74
  9. 78
  10. 6.7
  11. 162
  12. 62
  13. 152.5
  14. 3
  15. 40
  16. 170
  17. 7.8
  18. 84
  19. 6.4
  20. 32.5
  21. 27.5
  22. 7.5
  23. 195
  24. 44
  25. 122.5
  26. 1.6
  27. 99
  28. 72
  29. 85.5
  30. 80
  31. 7
  32. 76
  33. 124.5
  34. 140
  35. 108
  36. 36
  37. 126
  38. 25.5
  39. 1
  40. 65

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