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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 857 · 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 330 =
  2. 2.10% of 40 =
  3. 3.20% of 150 =
  4. 4.25% of 500 =
  5. 5.50% of 450 =
  6. 6.5% of 210 =
  7. 7.50% of 770 =
  8. 8.1% of 200 =
  9. 9.50% of 840 =
  10. 10.10% of 480 =
  11. 11.10% of 60 =
  12. 12.1% of 370 =
  13. 13.25% of 70 =
  14. 14.5% of 110 =
  15. 15.5% of 410 =
  16. 16.15% of 710 =
  17. 17.50% of 170 =
  18. 18.25% of 530 =
  19. 19.5% of 50 =
  20. 20.20% of 160 =
  21. 21.10% of 860 =
  22. 22.25% of 20 =
  23. 23.1% of 20 =
  24. 24.50% of 620 =
  25. 25.5% of 270 =
  26. 26.5% of 850 =
  27. 27.20% of 590 =
  28. 28.5% of 820 =
  29. 29.50% of 900 =
  30. 30.50% of 890 =
  31. 31.5% of 250 =
  32. 32.50% of 330 =
  33. 33.25% of 150 =
  34. 34.1% of 190 =
  35. 35.5% of 40 =
  36. 36.15% of 460 =
  37. 37.20% of 800 =
  38. 38.50% of 360 =
  39. 39.25% of 500 =
  40. 40.5% of 260 =

Answer key

  1. 49.5
  2. 4
  3. 30
  4. 125
  5. 225
  6. 10.5
  7. 385
  8. 2
  9. 420
  10. 48
  11. 6
  12. 3.7
  13. 17.5
  14. 5.5
  15. 20.5
  16. 106.5
  17. 85
  18. 132.5
  19. 2.5
  20. 32
  21. 86
  22. 5
  23. 0.2
  24. 310
  25. 13.5
  26. 42.5
  27. 118
  28. 41
  29. 450
  30. 445
  31. 12.5
  32. 165
  33. 37.5
  34. 1.9
  35. 2
  36. 69
  37. 160
  38. 180
  39. 125
  40. 13

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