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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 922 · 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. 1.25% of 750 =
  2. 2.10% of 120 =
  3. 3.50% of 780 =
  4. 4.10% of 680 =
  5. 5.5% of 440 =
  6. 6.1% of 620 =
  7. 7.1% of 830 =
  8. 8.5% of 570 =
  9. 9.10% of 600 =
  10. 10.50% of 900 =
  11. 11.5% of 560 =
  12. 12.5% of 390 =
  13. 13.5% of 800 =
  14. 14.50% of 430 =
  15. 15.10% of 130 =
  16. 16.50% of 140 =
  17. 17.5% of 140 =
  18. 18.10% of 150 =
  19. 19.25% of 170 =
  20. 20.5% of 630 =
  21. 21.1% of 700 =
  22. 22.10% of 250 =
  23. 23.10% of 770 =
  24. 24.25% of 180 =
  25. 25.5% of 250 =
  26. 26.10% of 400 =
  27. 27.15% of 270 =
  28. 28.50% of 900 =
  29. 29.10% of 510 =
  30. 30.10% of 370 =
  31. 31.10% of 470 =
  32. 32.20% of 740 =
  33. 33.1% of 890 =
  34. 34.1% of 520 =
  35. 35.10% of 100 =
  36. 36.15% of 700 =
  37. 37.50% of 470 =
  38. 38.10% of 720 =
  39. 39.25% of 310 =
  40. 40.15% of 200 =

Answer key

  1. 187.5
  2. 12
  3. 390
  4. 68
  5. 22
  6. 6.2
  7. 8.3
  8. 28.5
  9. 60
  10. 450
  11. 28
  12. 19.5
  13. 40
  14. 215
  15. 13
  16. 70
  17. 7
  18. 15
  19. 42.5
  20. 31.5
  21. 7
  22. 25
  23. 77
  24. 45
  25. 12.5
  26. 40
  27. 40.5
  28. 450
  29. 51
  30. 37
  31. 47
  32. 148
  33. 8.9
  34. 5.2
  35. 10
  36. 105
  37. 235
  38. 72
  39. 77.5
  40. 30

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