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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 724 · 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 340 =
  2. 2.10% of 410 =
  3. 3.5% of 660 =
  4. 4.5% of 120 =
  5. 5.50% of 710 =
  6. 6.20% of 660 =
  7. 7.50% of 120 =
  8. 8.20% of 700 =
  9. 9.5% of 510 =
  10. 10.20% of 240 =
  11. 11.15% of 870 =
  12. 12.1% of 260 =
  13. 13.15% of 720 =
  14. 14.25% of 900 =
  15. 15.5% of 820 =
  16. 16.1% of 660 =
  17. 17.5% of 260 =
  18. 18.15% of 630 =
  19. 19.5% of 780 =
  20. 20.5% of 210 =
  21. 21.25% of 210 =
  22. 22.10% of 500 =
  23. 23.50% of 200 =
  24. 24.5% of 700 =
  25. 25.15% of 280 =
  26. 26.10% of 280 =
  27. 27.20% of 810 =
  28. 28.1% of 840 =
  29. 29.1% of 210 =
  30. 30.20% of 300 =
  31. 31.20% of 580 =
  32. 32.5% of 70 =
  33. 33.20% of 800 =
  34. 34.20% of 30 =
  35. 35.20% of 690 =
  36. 36.5% of 840 =
  37. 37.50% of 750 =
  38. 38.10% of 600 =
  39. 39.5% of 520 =
  40. 40.10% of 570 =

Answer key

  1. 3.4
  2. 41
  3. 33
  4. 6
  5. 355
  6. 132
  7. 60
  8. 140
  9. 25.5
  10. 48
  11. 130.5
  12. 2.6
  13. 108
  14. 225
  15. 41
  16. 6.6
  17. 13
  18. 94.5
  19. 39
  20. 10.5
  21. 52.5
  22. 50
  23. 100
  24. 35
  25. 42
  26. 28
  27. 162
  28. 8.4
  29. 2.1
  30. 60
  31. 116
  32. 3.5
  33. 160
  34. 6
  35. 138
  36. 42
  37. 375
  38. 60
  39. 26
  40. 57

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