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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 836 · 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 840 =
  2. 2.20% of 680 =
  3. 3.25% of 330 =
  4. 4.10% of 670 =
  5. 5.50% of 120 =
  6. 6.20% of 250 =
  7. 7.1% of 680 =
  8. 8.50% of 410 =
  9. 9.25% of 180 =
  10. 10.20% of 200 =
  11. 11.5% of 870 =
  12. 12.1% of 240 =
  13. 13.25% of 240 =
  14. 14.10% of 190 =
  15. 15.20% of 170 =
  16. 16.25% of 280 =
  17. 17.15% of 780 =
  18. 18.50% of 70 =
  19. 19.5% of 610 =
  20. 20.1% of 330 =
  21. 21.15% of 90 =
  22. 22.1% of 440 =
  23. 23.50% of 720 =
  24. 24.10% of 160 =
  25. 25.1% of 80 =
  26. 26.5% of 20 =
  27. 27.15% of 170 =
  28. 28.1% of 180 =
  29. 29.10% of 400 =
  30. 30.50% of 90 =
  31. 31.1% of 680 =
  32. 32.10% of 160 =
  33. 33.50% of 310 =
  34. 34.20% of 820 =
  35. 35.25% of 500 =
  36. 36.1% of 380 =
  37. 37.10% of 130 =
  38. 38.25% of 640 =
  39. 39.10% of 760 =
  40. 40.5% of 150 =

Answer key

  1. 84
  2. 136
  3. 82.5
  4. 67
  5. 60
  6. 50
  7. 6.8
  8. 205
  9. 45
  10. 40
  11. 43.5
  12. 2.4
  13. 60
  14. 19
  15. 34
  16. 70
  17. 117
  18. 35
  19. 30.5
  20. 3.3
  21. 13.5
  22. 4.4
  23. 360
  24. 16
  25. 0.8
  26. 1
  27. 25.5
  28. 1.8
  29. 40
  30. 45
  31. 6.8
  32. 16
  33. 155
  34. 164
  35. 125
  36. 3.8
  37. 13
  38. 160
  39. 76
  40. 7.5

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