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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 982 · 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. 1.10% of 300 =
  2. 2.5% of 600 =
  3. 3.5% of 60 =
  4. 4.10% of 360 =
  5. 5.1% of 600 =
  6. 6.10% of 850 =
  7. 7.20% of 550 =
  8. 8.5% of 70 =
  9. 9.1% of 60 =
  10. 10.20% of 450 =
  11. 11.1% of 810 =
  12. 12.10% of 190 =
  13. 13.5% of 60 =
  14. 14.20% of 50 =
  15. 15.1% of 280 =
  16. 16.5% of 650 =
  17. 17.5% of 680 =
  18. 18.50% of 610 =
  19. 19.20% of 60 =
  20. 20.5% of 50 =
  21. 21.25% of 600 =
  22. 22.20% of 410 =
  23. 23.15% of 30 =
  24. 24.5% of 680 =
  25. 25.5% of 170 =
  26. 26.10% of 640 =
  27. 27.5% of 240 =
  28. 28.50% of 840 =
  29. 29.20% of 900 =
  30. 30.25% of 280 =
  31. 31.15% of 580 =
  32. 32.50% of 140 =
  33. 33.25% of 120 =
  34. 34.5% of 100 =
  35. 35.20% of 280 =
  36. 36.15% of 170 =
  37. 37.20% of 490 =
  38. 38.5% of 610 =
  39. 39.25% of 690 =
  40. 40.15% of 330 =

Answer key

  1. 30
  2. 30
  3. 3
  4. 36
  5. 6
  6. 85
  7. 110
  8. 3.5
  9. 0.6
  10. 90
  11. 8.1
  12. 19
  13. 3
  14. 10
  15. 2.8
  16. 32.5
  17. 34
  18. 305
  19. 12
  20. 2.5
  21. 150
  22. 82
  23. 4.5
  24. 34
  25. 8.5
  26. 64
  27. 12
  28. 420
  29. 180
  30. 70
  31. 87
  32. 70
  33. 30
  34. 5
  35. 56
  36. 25.5
  37. 98
  38. 30.5
  39. 172.5
  40. 49.5

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