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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 599 · 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 770 =
  2. 2.25% of 570 =
  3. 3.20% of 190 =
  4. 4.5% of 520 =
  5. 5.1% of 720 =
  6. 6.10% of 450 =
  7. 7.5% of 590 =
  8. 8.10% of 460 =
  9. 9.5% of 130 =
  10. 10.10% of 480 =
  11. 11.20% of 150 =
  12. 12.10% of 260 =
  13. 13.10% of 90 =
  14. 14.20% of 840 =
  15. 15.1% of 800 =
  16. 16.5% of 570 =
  17. 17.1% of 270 =
  18. 18.5% of 870 =
  19. 19.10% of 780 =
  20. 20.5% of 610 =
  21. 21.50% of 250 =
  22. 22.1% of 270 =
  23. 23.25% of 470 =
  24. 24.5% of 220 =
  25. 25.10% of 500 =
  26. 26.5% of 880 =
  27. 27.15% of 810 =
  28. 28.50% of 560 =
  29. 29.10% of 250 =
  30. 30.20% of 430 =
  31. 31.20% of 740 =
  32. 32.10% of 60 =
  33. 33.50% of 660 =
  34. 34.10% of 300 =
  35. 35.15% of 140 =
  36. 36.1% of 480 =
  37. 37.5% of 530 =
  38. 38.50% of 150 =
  39. 39.5% of 750 =
  40. 40.20% of 560 =

Answer key

  1. 7.7
  2. 142.5
  3. 38
  4. 26
  5. 7.2
  6. 45
  7. 29.5
  8. 46
  9. 6.5
  10. 48
  11. 30
  12. 26
  13. 9
  14. 168
  15. 8
  16. 28.5
  17. 2.7
  18. 43.5
  19. 78
  20. 30.5
  21. 125
  22. 2.7
  23. 117.5
  24. 11
  25. 50
  26. 44
  27. 121.5
  28. 280
  29. 25
  30. 86
  31. 148
  32. 6
  33. 330
  34. 30
  35. 21
  36. 4.8
  37. 26.5
  38. 75
  39. 37.5
  40. 112

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