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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 887 · 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. 1.20% of 310 =
  2. 2.15% of 550 =
  3. 3.50% of 420 =
  4. 4.10% of 870 =
  5. 5.50% of 790 =
  6. 6.15% of 520 =
  7. 7.1% of 710 =
  8. 8.10% of 160 =
  9. 9.5% of 900 =
  10. 10.20% of 260 =
  11. 11.20% of 180 =
  12. 12.25% of 490 =
  13. 13.50% of 170 =
  14. 14.5% of 500 =
  15. 15.10% of 690 =
  16. 16.50% of 30 =
  17. 17.10% of 670 =
  18. 18.15% of 70 =
  19. 19.50% of 600 =
  20. 20.1% of 790 =
  21. 21.50% of 500 =
  22. 22.25% of 510 =
  23. 23.15% of 220 =
  24. 24.5% of 90 =
  25. 25.20% of 460 =
  26. 26.50% of 110 =
  27. 27.5% of 300 =
  28. 28.1% of 620 =
  29. 29.10% of 300 =
  30. 30.5% of 450 =
  31. 31.50% of 130 =
  32. 32.1% of 60 =
  33. 33.15% of 600 =
  34. 34.25% of 550 =
  35. 35.25% of 780 =
  36. 36.15% of 50 =
  37. 37.5% of 330 =
  38. 38.5% of 70 =
  39. 39.5% of 30 =
  40. 40.20% of 850 =

Answer key

  1. 62
  2. 82.5
  3. 210
  4. 87
  5. 395
  6. 78
  7. 7.1
  8. 16
  9. 45
  10. 52
  11. 36
  12. 122.5
  13. 85
  14. 25
  15. 69
  16. 15
  17. 67
  18. 10.5
  19. 300
  20. 7.9
  21. 250
  22. 127.5
  23. 33
  24. 4.5
  25. 92
  26. 55
  27. 15
  28. 6.2
  29. 30
  30. 22.5
  31. 65
  32. 0.6
  33. 90
  34. 137.5
  35. 195
  36. 7.5
  37. 16.5
  38. 3.5
  39. 1.5
  40. 170

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