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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 878 · 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. 1.5% of 170 =
  2. 2.20% of 650 =
  3. 3.20% of 610 =
  4. 4.1% of 510 =
  5. 5.5% of 370 =
  6. 6.25% of 50 =
  7. 7.10% of 200 =
  8. 8.50% of 40 =
  9. 9.15% of 440 =
  10. 10.20% of 310 =
  11. 11.15% of 210 =
  12. 12.50% of 450 =
  13. 13.15% of 200 =
  14. 14.10% of 170 =
  15. 15.15% of 550 =
  16. 16.1% of 140 =
  17. 17.20% of 240 =
  18. 18.15% of 210 =
  19. 19.1% of 250 =
  20. 20.1% of 330 =
  21. 21.10% of 130 =
  22. 22.25% of 470 =
  23. 23.20% of 900 =
  24. 24.15% of 30 =
  25. 25.10% of 50 =
  26. 26.10% of 560 =
  27. 27.25% of 90 =
  28. 28.25% of 510 =
  29. 29.15% of 110 =
  30. 30.25% of 540 =
  31. 31.10% of 170 =
  32. 32.50% of 760 =
  33. 33.5% of 530 =
  34. 34.25% of 410 =
  35. 35.5% of 880 =
  36. 36.1% of 710 =
  37. 37.10% of 630 =
  38. 38.50% of 750 =
  39. 39.10% of 850 =
  40. 40.15% of 640 =

Answer key

  1. 8.5
  2. 130
  3. 122
  4. 5.1
  5. 18.5
  6. 12.5
  7. 20
  8. 20
  9. 66
  10. 62
  11. 31.5
  12. 225
  13. 30
  14. 17
  15. 82.5
  16. 1.4
  17. 48
  18. 31.5
  19. 2.5
  20. 3.3
  21. 13
  22. 117.5
  23. 180
  24. 4.5
  25. 5
  26. 56
  27. 22.5
  28. 127.5
  29. 16.5
  30. 135
  31. 17
  32. 380
  33. 26.5
  34. 102.5
  35. 44
  36. 7.1
  37. 63
  38. 375
  39. 85
  40. 96

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