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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 909 · 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 170 =
  2. 2.15% of 530 =
  3. 3.10% of 270 =
  4. 4.10% of 530 =
  5. 5.5% of 360 =
  6. 6.10% of 530 =
  7. 7.20% of 570 =
  8. 8.10% of 180 =
  9. 9.10% of 830 =
  10. 10.15% of 660 =
  11. 11.5% of 440 =
  12. 12.10% of 470 =
  13. 13.50% of 40 =
  14. 14.15% of 760 =
  15. 15.15% of 150 =
  16. 16.15% of 330 =
  17. 17.5% of 430 =
  18. 18.1% of 230 =
  19. 19.1% of 560 =
  20. 20.50% of 240 =
  21. 21.5% of 250 =
  22. 22.5% of 290 =
  23. 23.5% of 80 =
  24. 24.1% of 900 =
  25. 25.10% of 420 =
  26. 26.1% of 690 =
  27. 27.15% of 360 =
  28. 28.10% of 280 =
  29. 29.5% of 470 =
  30. 30.10% of 810 =
  31. 31.15% of 20 =
  32. 32.20% of 240 =
  33. 33.10% of 550 =
  34. 34.25% of 230 =
  35. 35.25% of 760 =
  36. 36.50% of 740 =
  37. 37.10% of 700 =
  38. 38.5% of 400 =
  39. 39.1% of 770 =
  40. 40.5% of 480 =

Answer key

  1. 34
  2. 79.5
  3. 27
  4. 53
  5. 18
  6. 53
  7. 114
  8. 18
  9. 83
  10. 99
  11. 22
  12. 47
  13. 20
  14. 114
  15. 22.5
  16. 49.5
  17. 21.5
  18. 2.3
  19. 5.6
  20. 120
  21. 12.5
  22. 14.5
  23. 4
  24. 9
  25. 42
  26. 6.9
  27. 54
  28. 28
  29. 23.5
  30. 81
  31. 3
  32. 48
  33. 55
  34. 57.5
  35. 190
  36. 370
  37. 70
  38. 20
  39. 7.7
  40. 24

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