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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 903 · 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. 1.50% of 700 =
  2. 2.25% of 710 =
  3. 3.10% of 470 =
  4. 4.10% of 210 =
  5. 5.10% of 330 =
  6. 6.50% of 230 =
  7. 7.25% of 360 =
  8. 8.10% of 570 =
  9. 9.15% of 730 =
  10. 10.10% of 150 =
  11. 11.20% of 340 =
  12. 12.25% of 340 =
  13. 13.1% of 190 =
  14. 14.5% of 360 =
  15. 15.20% of 890 =
  16. 16.10% of 620 =
  17. 17.10% of 380 =
  18. 18.5% of 300 =
  19. 19.25% of 100 =
  20. 20.25% of 730 =
  21. 21.10% of 400 =
  22. 22.1% of 250 =
  23. 23.20% of 520 =
  24. 24.50% of 270 =
  25. 25.15% of 550 =
  26. 26.25% of 600 =
  27. 27.25% of 360 =
  28. 28.50% of 760 =
  29. 29.25% of 320 =
  30. 30.20% of 390 =
  31. 31.50% of 360 =
  32. 32.1% of 430 =
  33. 33.25% of 250 =
  34. 34.50% of 330 =
  35. 35.20% of 230 =
  36. 36.25% of 20 =
  37. 37.20% of 160 =
  38. 38.25% of 790 =
  39. 39.50% of 210 =
  40. 40.15% of 550 =

Answer key

  1. 350
  2. 177.5
  3. 47
  4. 21
  5. 33
  6. 115
  7. 90
  8. 57
  9. 109.5
  10. 15
  11. 68
  12. 85
  13. 1.9
  14. 18
  15. 178
  16. 62
  17. 38
  18. 15
  19. 25
  20. 182.5
  21. 40
  22. 2.5
  23. 104
  24. 135
  25. 82.5
  26. 150
  27. 90
  28. 380
  29. 80
  30. 78
  31. 180
  32. 4.3
  33. 62.5
  34. 165
  35. 46
  36. 5
  37. 32
  38. 197.5
  39. 105
  40. 82.5

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