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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 983 · 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. 1.15% of 620 =
  2. 2.10% of 830 =
  3. 3.1% of 520 =
  4. 4.15% of 680 =
  5. 5.15% of 520 =
  6. 6.20% of 720 =
  7. 7.1% of 410 =
  8. 8.10% of 630 =
  9. 9.1% of 560 =
  10. 10.15% of 740 =
  11. 11.20% of 100 =
  12. 12.15% of 490 =
  13. 13.10% of 540 =
  14. 14.15% of 110 =
  15. 15.15% of 310 =
  16. 16.10% of 30 =
  17. 17.50% of 170 =
  18. 18.20% of 200 =
  19. 19.1% of 710 =
  20. 20.10% of 160 =
  21. 21.5% of 230 =
  22. 22.50% of 830 =
  23. 23.5% of 440 =
  24. 24.15% of 150 =
  25. 25.20% of 560 =
  26. 26.5% of 550 =
  27. 27.50% of 840 =
  28. 28.1% of 870 =
  29. 29.5% of 670 =
  30. 30.15% of 170 =
  31. 31.15% of 360 =
  32. 32.25% of 670 =
  33. 33.10% of 900 =
  34. 34.25% of 870 =
  35. 35.50% of 360 =
  36. 36.10% of 180 =
  37. 37.10% of 740 =
  38. 38.50% of 470 =
  39. 39.10% of 590 =
  40. 40.25% of 150 =

Answer key

  1. 93
  2. 83
  3. 5.2
  4. 102
  5. 78
  6. 144
  7. 4.1
  8. 63
  9. 5.6
  10. 111
  11. 20
  12. 73.5
  13. 54
  14. 16.5
  15. 46.5
  16. 3
  17. 85
  18. 40
  19. 7.1
  20. 16
  21. 11.5
  22. 415
  23. 22
  24. 22.5
  25. 112
  26. 27.5
  27. 420
  28. 8.7
  29. 33.5
  30. 25.5
  31. 54
  32. 167.5
  33. 90
  34. 217.5
  35. 180
  36. 18
  37. 74
  38. 235
  39. 59
  40. 37.5

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